From 5c8a4a83dcbf4ed4bb34d60b175feb69c2ece198 Mon Sep 17 00:00:00 2001
From: github-actions
 <site-update+github-actions[bot]@users.noreply.github.com>
Date: Wed, 1 Jan 2025 19:56:39 +0000
Subject: [PATCH] [automated site update]

---
 apidoc/html/globals_func.html     |  30 +++---
 apidoc/html/globals_x.html        |  22 +++--
 apidoc/html/index.html            |  24 ++---
 apidoc/html/navtreedata.js        |   2 +-
 apidoc/html/navtreeindex0.js      |  94 +++++++++----------
 apidoc/html/navtreeindex1.js      |  48 +++++-----
 apidoc/html/search/all_14.js      | 142 +++++++++++++++--------------
 apidoc/html/search/functions_0.js | 122 +++++++++++++------------
 apidoc/html/toc.xml               |  12 ++-
 apidoc/html/xchange_8h.html       | 147 +++++++++++++++++++++++-------
 apidoc/html/xchange_8h.js         |   6 +-
 apidoc/html/xstruct_8c.html       | 147 +++++++++++++++++++++++-------
 apidoc/html/xstruct_8c.js         |   6 +-
 apidoc/man/man3/xchange.h.3       |  97 ++++++++++++++++----
 apidoc/man/man3/xstruct.c.3       |  97 ++++++++++++++++----
 apidoc/xchange.tag                |  44 +++++++--
 16 files changed, 692 insertions(+), 348 deletions(-)

diff --git a/apidoc/html/globals_func.html b/apidoc/html/globals_func.html
index 3611033..3cdf460 100644
--- a/apidoc/html/globals_func.html
+++ b/apidoc/html/globals_func.html
@@ -124,21 +124,21 @@ <h3><a id="index_x" name="index_x"></a>- x -</h3><ul>
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 <div class="line"><a class="code hl_struct" href="structXField.html">XField</a> *fs = <a class="code hl_function" href="xstruct_8c.html#a9dc77bed0d8b738ba615019721a6a2b6">xCreateStringField</a>(<span class="stringliteral">&quot;description&quot;</span>, <span class="stringliteral">&quot;blah-blah-blah&quot;</span>);</div>
 <div class="ttc" id="astructXField_html"><div class="ttname"><a href="structXField.html">XField</a></div><div class="ttdoc">An SMA-X field, typically as part of an XStructure. A field may be a reference to a nested XStructure...</div><div class="ttdef"><b>Definition</b> xchange.h:139</div></div>
 <div class="ttc" id="axjson_8c_html_aa8cecfc5c5c054d2875c03e77b7be15d"><div class="ttname"><a href="xjson_8c.html#aa8cecfc5c5c054d2875c03e77b7be15d">TRUE</a></div><div class="ttdeci">#define TRUE</div><div class="ttdoc">Boolean 'true' in case it isn't already defined.</div><div class="ttdef"><b>Definition</b> xjson.c:23</div></div>
-<div class="ttc" id="axstruct_8c_html_a9dc77bed0d8b738ba615019721a6a2b6"><div class="ttname"><a href="xstruct_8c.html#a9dc77bed0d8b738ba615019721a6a2b6">xCreateStringField</a></div><div class="ttdeci">XField * xCreateStringField(const char *name, const char *value)</div><div class="ttdef"><b>Definition</b> xstruct.c:661</div></div>
-<div class="ttc" id="axstruct_8c_html_aa4405d56659397e044b6d4fdda394dfa"><div class="ttname"><a href="xstruct_8c.html#aa4405d56659397e044b6d4fdda394dfa">xCreateIntField</a></div><div class="ttdeci">XField * xCreateIntField(const char *name, int value)</div><div class="ttdef"><b>Definition</b> xstruct.c:615</div></div>
-<div class="ttc" id="axstruct_8c_html_ab7ac206d0ec3608a0872f09c7f7bc189"><div class="ttname"><a href="xstruct_8c.html#ab7ac206d0ec3608a0872f09c7f7bc189">xCreateDoubleField</a></div><div class="ttdeci">XField * xCreateDoubleField(const char *name, double value)</div><div class="ttdef"><b>Definition</b> xstruct.c:599</div></div>
-<div class="ttc" id="axstruct_8c_html_ad2fa86a7d296f1efa6b41079bc2a6b65"><div class="ttname"><a href="xstruct_8c.html#ad2fa86a7d296f1efa6b41079bc2a6b65">xCreateBooleanField</a></div><div class="ttdeci">XField * xCreateBooleanField(const char *name, boolean value)</div><div class="ttdef"><b>Definition</b> xstruct.c:646</div></div>
+<div class="ttc" id="axstruct_8c_html_a9dc77bed0d8b738ba615019721a6a2b6"><div class="ttname"><a href="xstruct_8c.html#a9dc77bed0d8b738ba615019721a6a2b6">xCreateStringField</a></div><div class="ttdeci">XField * xCreateStringField(const char *name, const char *value)</div><div class="ttdef"><b>Definition</b> xstruct.c:738</div></div>
+<div class="ttc" id="axstruct_8c_html_aa4405d56659397e044b6d4fdda394dfa"><div class="ttname"><a href="xstruct_8c.html#aa4405d56659397e044b6d4fdda394dfa">xCreateIntField</a></div><div class="ttdeci">XField * xCreateIntField(const char *name, int value)</div><div class="ttdef"><b>Definition</b> xstruct.c:692</div></div>
+<div class="ttc" id="axstruct_8c_html_ab7ac206d0ec3608a0872f09c7f7bc189"><div class="ttname"><a href="xstruct_8c.html#ab7ac206d0ec3608a0872f09c7f7bc189">xCreateDoubleField</a></div><div class="ttdeci">XField * xCreateDoubleField(const char *name, double value)</div><div class="ttdef"><b>Definition</b> xstruct.c:676</div></div>
+<div class="ttc" id="axstruct_8c_html_ad2fa86a7d296f1efa6b41079bc2a6b65"><div class="ttname"><a href="xstruct_8c.html#ad2fa86a7d296f1efa6b41079bc2a6b65">xCreateBooleanField</a></div><div class="ttdeci">XField * xCreateBooleanField(const char *name, boolean value)</div><div class="ttdef"><b>Definition</b> xstruct.c:723</div></div>
 </div><!-- fragment --><p>Under the hood, scalar values are a special case of arrays containing a single element. Scalars have dimension zero i.e., a shape defined by an empty integer array, e.g. <code>int shape[0]</code> in a corresponding <code><a class="el" href="structXField.html" title="An SMA-X field, typically as part of an XStructure. A field may be a reference to a nested XStructure...">XField</a></code> element.</p>
 <p>In this way scalars are distinguished from true arrays containing just a single elements, which have dimensionality &lt;=1 and shapes e.g., <code>int shape[1] = {1}</code> or <code>int shape[2] = {1, 1}</code>. The difference, while subtle, becomes more obvious when serializing the array, e.g. to JSON. A scalar floating point value of 1.04, for example, will appear as <code>1.04</code> in JSON, whereas the 1D and 2D single-element arrays will be serialized as <code>{ 1.04 }</code> or <code>{{ 1.04 }}</code>, respectively.</p>
 <p><a class="anchor" id="arrays"></a> </p>
@@ -256,7 +256,7 @@ <h3><a class="anchor" id="autotoc_md15"></a>
 <div class="line"><span class="comment">// Create a field for the 3-dimensional array with the specified shape.</span></div>
 <div class="line"><a class="code hl_struct" href="structXField.html">XField</a> *f = <a class="code hl_function" href="xstruct_8c.html#a42e4e75cbf8f721ef4b251c692dcd7cb">xCreateField</a>(<span class="stringliteral">&quot;my-array&quot;</span>, <a class="code hl_define" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, 3, sizes, data);</div>
 <div class="ttc" id="axchange_8h_html_a849c7ccb02f63d8554323a889a3d8b4d"><div class="ttname"><a href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a></div><div class="ttdeci">#define X_DOUBLE</div><div class="ttdoc">double-precision (64) bit floating point XType</div><div class="ttdef"><b>Definition</b> xchange.h:93</div></div>
-<div class="ttc" id="axstruct_8c_html_a42e4e75cbf8f721ef4b251c692dcd7cb"><div class="ttname"><a href="xstruct_8c.html#a42e4e75cbf8f721ef4b251c692dcd7cb">xCreateField</a></div><div class="ttdeci">XField * xCreateField(const char *name, XType type, int ndim, const int *sizes, const void *value)</div><div class="ttdef"><b>Definition</b> xstruct.c:474</div></div>
+<div class="ttc" id="axstruct_8c_html_a42e4e75cbf8f721ef4b251c692dcd7cb"><div class="ttname"><a href="xstruct_8c.html#a42e4e75cbf8f721ef4b251c692dcd7cb">xCreateField</a></div><div class="ttdeci">XField * xCreateField(const char *name, XType type, int ndim, const int *sizes, const void *value)</div><div class="ttdef"><b>Definition</b> xstruct.c:551</div></div>
 </div><!-- fragment --><p>Note, that there is no requirement that the native array has the same dimensionality as it's nominal format in the field. We could have declared <code>data</code> as a 1D array <code>double data[2 * 3 * 4] = ...</code>, or really any array (pointer) containing doubles with storage for at least 24 elements. It is the <code>sizes</code> array, along with the dimensionality, which together define the number of elements used from it, and the shape of the array for <b>xchange</b>.</p>
 <p>Arrays of irregular shape or mixed element types can be represented by fields containing an array of <code><a class="el" href="structXField.html" title="An SMA-X field, typically as part of an XStructure. A field may be a reference to a nested XStructure...">XField</a></code> entries:</p>
 <div class="fragment"><div class="line"><a class="code hl_struct" href="structXField.html">XField</a> *row1, row2, ...          <span class="comment">// Heterogeneous entries, each wrapped in an `XField`</span></div>
@@ -286,12 +286,12 @@ <h3><a class="anchor" id="autotoc_md16"></a>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#ab1cb91bd6aa14c0dae9d24bfbe7b76f4">xSetField</a>(sub, <span class="stringliteral">&quot;property&quot;</span>, <a class="code hl_function" href="xstruct_8c.html#a9dc77bed0d8b738ba615019721a6a2b6">xCreateStringField</a>(<span class="stringliteral">&quot;some value here&quot;</span>));</div>
 <div class="ttc" id="astructXStructure_html"><div class="ttname"><a href="structXStructure.html">XStructure</a></div><div class="ttdoc">SMA-X structure object, containing a linked-list of XField elements.</div><div class="ttdef"><b>Definition</b> xchange.h:166</div></div>
 <div class="ttc" id="axstruct_8c_html_a12112584a34e07f9ef7b08f6ef1bc865"><div class="ttname"><a href="xstruct_8c.html#a12112584a34e07f9ef7b08f6ef1bc865">xCreateStruct</a></div><div class="ttdeci">XStructure * xCreateStruct()</div><div class="ttdef"><b>Definition</b> xstruct.c:28</div></div>
-<div class="ttc" id="axstruct_8c_html_ab1cb91bd6aa14c0dae9d24bfbe7b76f4"><div class="ttname"><a href="xstruct_8c.html#ab1cb91bd6aa14c0dae9d24bfbe7b76f4">xSetField</a></div><div class="ttdeci">XField * xSetField(XStructure *s, XField *f)</div><div class="ttdef"><b>Definition</b> xstruct.c:914</div></div>
-<div class="ttc" id="axstruct_8c_html_ad84cbb4639f2fbfb604b698a86caf944"><div class="ttname"><a href="xstruct_8c.html#ad84cbb4639f2fbfb604b698a86caf944">xSetSubstruct</a></div><div class="ttdeci">XField * xSetSubstruct(XStructure *s, const char *name, XStructure *substruct)</div><div class="ttdef"><b>Definition</b> xstruct.c:769</div></div>
+<div class="ttc" id="axstruct_8c_html_ab1cb91bd6aa14c0dae9d24bfbe7b76f4"><div class="ttname"><a href="xstruct_8c.html#ab1cb91bd6aa14c0dae9d24bfbe7b76f4">xSetField</a></div><div class="ttdeci">XField * xSetField(XStructure *s, XField *f)</div><div class="ttdef"><b>Definition</b> xstruct.c:994</div></div>
+<div class="ttc" id="axstruct_8c_html_ad84cbb4639f2fbfb604b698a86caf944"><div class="ttname"><a href="xstruct_8c.html#ad84cbb4639f2fbfb604b698a86caf944">xSetSubstruct</a></div><div class="ttdeci">XField * xSetSubstruct(XStructure *s, const char *name, XStructure *substruct)</div><div class="ttdef"><b>Definition</b> xstruct.c:849</div></div>
 </div><!-- fragment --><p>and then eventually destroyed after use as:</p>
 <div class="fragment"><div class="line"><span class="comment">// Free up all resources used by the structure &#39;s&#39;</span></div>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#afe3fda2f392bae11e136e8c0c90f086d">xDestroyStruct</a>(s);</div>
-<div class="ttc" id="axstruct_8c_html_afe3fda2f392bae11e136e8c0c90f086d"><div class="ttname"><a href="xstruct_8c.html#afe3fda2f392bae11e136e8c0c90f086d">xDestroyStruct</a></div><div class="ttdeci">void xDestroyStruct(XStructure *s)</div><div class="ttdef"><b>Definition</b> xstruct.c:988</div></div>
+<div class="ttc" id="axstruct_8c_html_afe3fda2f392bae11e136e8c0c90f086d"><div class="ttname"><a href="xstruct_8c.html#afe3fda2f392bae11e136e8c0c90f086d">xDestroyStruct</a></div><div class="ttdeci">void xDestroyStruct(XStructure *s)</div><div class="ttdef"><b>Definition</b> xstruct.c:1068</div></div>
 </div><!-- fragment --><p><a class="anchor" id="aggregate-ids"></a> </p>
 <h3><a class="anchor" id="autotoc_md17"></a>
 Aggregate IDs</h3>
@@ -313,7 +313,7 @@ <h3><a class="anchor" id="autotoc_md18"></a>
 <div class="ttc" id="axstruct_8c_html_a442f155b0c6549549737510ce42bb66d"><div class="ttname"><a href="xstruct_8c.html#a442f155b0c6549549737510ce42bb66d">xGetField</a></div><div class="ttdeci">XField * xGetField(const XStructure *s, const char *id)</div><div class="ttdef"><b>Definition</b> xstruct.c:254</div></div>
 </div><!-- fragment --><p>or to retrieve the "subsystem" structure from within:</p>
 <div class="fragment"><div class="line"><a class="code hl_struct" href="structXStructure.html">XStructure</a> *sub = <a class="code hl_function" href="xstruct_8c.html#a97a58e33c4730e272af459dfb7f016f9">xGetSubstruct</a>(s, <span class="stringliteral">&quot;system:subsystem&quot;</span>);</div>
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+<div class="ttc" id="axstruct_8c_html_a97a58e33c4730e272af459dfb7f016f9"><div class="ttname"><a href="xstruct_8c.html#a97a58e33c4730e272af459dfb7f016f9">xGetSubstruct</a></div><div class="ttdeci">XStructure * xGetSubstruct(const XStructure *s, const char *id)</div><div class="ttdef"><b>Definition</b> xstruct.c:513</div></div>
 </div><!-- fragment --><p>Conversely you can set / update fields in a structure using <code><a class="el" href="xstruct_8c.html#ab1cb91bd6aa14c0dae9d24bfbe7b76f4">xSetField()</a></code> / <code><a class="el" href="xstruct_8c.html#ad84cbb4639f2fbfb604b698a86caf944">xSetSubstruct()</a></code>, e.g.:</p>
 <div class="fragment"><div class="line">XStructrure *newsub = ...     <span class="comment">// The new substructure</span></div>
 <div class="line"><a class="code hl_struct" href="structXField.html">XField</a> *newfield = ...        <span class="comment">// A new field to set</span></div>
@@ -325,11 +325,11 @@ <h3><a class="anchor" id="autotoc_md18"></a>
 <div class="fragment"><div class="line"><span class="comment">// Destroy the replaced fields if they are no longer needed.</span></div>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#ae0ce99c867b11bd14971031eec8ba4ad">xDestroyField</a>(oldfield);</div>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#ae0ce99c867b11bd14971031eec8ba4ad">xDestroyField</a>(oldsub);</div>
-<div class="ttc" id="axstruct_8c_html_ae0ce99c867b11bd14971031eec8ba4ad"><div class="ttname"><a href="xstruct_8c.html#ae0ce99c867b11bd14971031eec8ba4ad">xDestroyField</a></div><div class="ttdeci">void xDestroyField(XField *f)</div><div class="ttdef"><b>Definition</b> xstruct.c:1036</div></div>
+<div class="ttc" id="axstruct_8c_html_ae0ce99c867b11bd14971031eec8ba4ad"><div class="ttname"><a href="xstruct_8c.html#ae0ce99c867b11bd14971031eec8ba4ad">xDestroyField</a></div><div class="ttdeci">void xDestroyField(XField *f)</div><div class="ttdef"><b>Definition</b> xstruct.c:1116</div></div>
 </div><!-- fragment --><p>You can also remove existing fields from structures using <code><a class="el" href="xstruct_8c.html#aec9f913cdb79d8653668a5d9bdda6ab1">xRemoveField()</a></code>, e.g.</p>
 <div class="fragment"><div class="line"><span class="comment">// Remove and then destroy the field named &quot;blah&quot; in structure &#39;s&#39;.</span></div>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#ae0ce99c867b11bd14971031eec8ba4ad">xDestroyField</a>(<a class="code hl_function" href="xstruct_8c.html#aec9f913cdb79d8653668a5d9bdda6ab1">xRemoveField</a>(s, <span class="stringliteral">&quot;blah&quot;</span>));</div>
-<div class="ttc" id="axstruct_8c_html_aec9f913cdb79d8653668a5d9bdda6ab1"><div class="ttname"><a href="xstruct_8c.html#aec9f913cdb79d8653668a5d9bdda6ab1">xRemoveField</a></div><div class="ttdeci">XField * xRemoveField(XStructure *s, const char *name)</div><div class="ttdef"><b>Definition</b> xstruct.c:816</div></div>
+<div class="ttc" id="axstruct_8c_html_aec9f913cdb79d8653668a5d9bdda6ab1"><div class="ttname"><a href="xstruct_8c.html#aec9f913cdb79d8653668a5d9bdda6ab1">xRemoveField</a></div><div class="ttdeci">XField * xRemoveField(XStructure *s, const char *name)</div><div class="ttdef"><b>Definition</b> xstruct.c:896</div></div>
 </div><!-- fragment --><h4><a class="anchor" id="autotoc_md19"></a>
 Large structures</h4>
 <p>The normal <code><a class="el" href="xstruct_8c.html#a442f155b0c6549549737510ce42bb66d">xGetField()</a></code> and <code><a class="el" href="xstruct_8c.html#a97a58e33c4730e272af459dfb7f016f9">xGetSubstruct()</a></code> functions have computational costs that scale linearly with the number of direct fields in the structure. It is not much of an issue for structures that contain dozens of, or even a couple hundred, fields (per layer). For much larger structures, which have a fixed layout, there is an option for a potentially much more efficient hash-based lookup also. E.g. instead of <code><a class="el" href="xstruct_8c.html#a442f155b0c6549549737510ce42bb66d">xGetField()</a></code> you may use <code><a class="el" href="xlookup_8c.html#a5e3a316b7d0c5c40ed079f3df2d9fcc9">xLookupField()</a></code>:</p>
@@ -371,7 +371,7 @@ <h3><a class="anchor" id="autotoc_md21"></a>
 <div class="line"> </div>
 <div class="line"><span class="comment">// Reverse the order, recursively</span></div>
 <div class="line"><a class="code hl_function" href="xstruct_8c.html#ad32d8a3f211a3b101142879ae31146ec">xReverseFieldOrder</a>(s, <a class="code hl_define" href="xjson_8c.html#aa8cecfc5c5c054d2875c03e77b7be15d">TRUE</a>);</div>
-<div class="ttc" id="axstruct_8c_html_ad32d8a3f211a3b101142879ae31146ec"><div class="ttname"><a href="xstruct_8c.html#ad32d8a3f211a3b101142879ae31146ec">xReverseFieldOrder</a></div><div class="ttdeci">int xReverseFieldOrder(XStructure *s, boolean recursive)</div><div class="ttdef"><b>Definition</b> xstruct.c:1494</div></div>
+<div class="ttc" id="axstruct_8c_html_ad32d8a3f211a3b101142879ae31146ec"><div class="ttname"><a href="xstruct_8c.html#ad32d8a3f211a3b101142879ae31146ec">xReverseFieldOrder</a></div><div class="ttdeci">int xReverseFieldOrder(XStructure *s, boolean recursive)</div><div class="ttdef"><b>Definition</b> xstruct.c:1574</div></div>
 </div><!-- fragment --><hr  />
 <p><a class="anchor" id="json-interchange"></a> </p>
 <h2><a class="anchor" id="autotoc_md23"></a>
diff --git a/apidoc/html/navtreedata.js b/apidoc/html/navtreedata.js
index b564987..015e062 100644
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@@ -78,7 +78,7 @@ var NAVTREE =
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+<tr class="memitem:ae9fbb705ce77cec34188dd1baf596797" id="r_ae9fbb705ce77cec34188dd1baf596797"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="xchange_8h.html#ae9fbb705ce77cec34188dd1baf596797">xGetAsLong</a> (const <a class="el" href="structXField.html">XField</a> *f, long defaultValue)</td></tr>
+<tr class="separator:ae9fbb705ce77cec34188dd1baf596797"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a23cc993336df0815333a58476b472713" id="r_a23cc993336df0815333a58476b472713"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="xchange_8h.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex</a> (const <a class="el" href="structXField.html">XField</a> *f, int idx, long defaultValue)</td></tr>
+<tr class="separator:a23cc993336df0815333a58476b472713"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:ae683dbdc302ce2ce78f77c5301e09386" id="r_ae683dbdc302ce2ce78f77c5301e09386"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="xchange_8h.html#ae683dbdc302ce2ce78f77c5301e09386">xGetElementAtIndex</a> (const <a class="el" href="structXField.html">XField</a> *f, int idx)</td></tr>
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@@ -1580,8 +1584,8 @@ <h2 class="memtitle"><span class="permalink"><a href="#a32e104d7a23090f8ae0e6ea3
 
 </div>
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-<a id="afbdf1037becd273141c12740949f7956" name="afbdf1037becd273141c12740949f7956"></a>
-<h2 class="memtitle"><span class="permalink"><a href="#afbdf1037becd273141c12740949f7956">&#9670;&#160;</a></span>xGetAsDouble()</h2>
+<a id="aebc8ee4733de2abb4ba41c725a3e6c2b" name="aebc8ee4733de2abb4ba41c725a3e6c2b"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#aebc8ee4733de2abb4ba41c725a3e6c2b">&#9670;&#160;</a></span>xGetAsDouble()</h2>
 
 <div class="memitem">
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         <tr>
           <td class="memname">double xGetAsDouble </td>
           <td>(</td>
-          <td class="paramtype">const <a class="el" href="structXStructure.html">XStructure</a> *&#160;</td>
-          <td class="paramname"><em>s</em>, </td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Return a double-precision floating point value associated to the field, or else NAN if the field cannot be represented as a decimal value. This call will use widening conversions as necessary to convert between numerical types (e.g. <code>short</code> to <code>double</code>), while for string values will attempt to parse a decomal value.</p>
+<p>If the field is an array, the first element is converted and returned.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">f</td><td>Pointer to field</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as a double-precision floating point value, if possible, or else NAN. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#ae9fbb705ce77cec34188dd1baf596797">xGetAsLong()</a> </dd></dl>
+
+<p class="reference">References <a class="el" href="xchange_8c.html#ac39ae03ca89b115d49a12f633522dc31">x_trace_null()</a>, and <a class="el" href="xstruct_8c.html#aa8cf23d1d1685d5ba1d1b589d1e5c567">xGetAsDoubleAtIndex()</a>.</p>
+
+</div>
+</div>
+<a id="aa8cf23d1d1685d5ba1d1b589d1e5c567" name="aa8cf23d1d1685d5ba1d1b589d1e5c567"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#aa8cf23d1d1685d5ba1d1b589d1e5c567">&#9670;&#160;</a></span>xGetAsDoubleAtIndex()</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">double xGetAsDoubleAtIndex </td>
+          <td>(</td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em>, </td>
         </tr>
         <tr>
           <td class="paramkey"></td>
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-          <td class="paramtype">const char *&#160;</td>
-          <td class="paramname"><em>id</em>&#160;</td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>idx</em>&#160;</td>
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         <tr>
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         </tr>
       </table>
 </div><div class="memdoc">
-<p>Return a double-precision floating point value associated to the field by the specified name, or else NAN if the field cannot be represented as a decimal value. This call will use widening conversions as necessary to convert between numerical types (e.g. <code>short</code> to <code>double</code>), while for string values will attempt to parse a decomal value.</p>
+<p>Return a double-precision floating point value associated to the field, or else NAN if the element cannot be represented as a decimal value. This call will use widening conversions as necessary to convert between numerical types (e.g. <code>short</code> to <code>double</code>), while for string values will attempt to parse a decomal value.</p>
 <p>If the field is an array, the first element is converted and returned.</p>
 <dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
-    <tr><td class="paramname">s</td><td>Structure from which to retrieve a given field. </td></tr>
-    <tr><td class="paramname">id</td><td>Name or aggregate ID of the field to retrieve.</td></tr>
+    <tr><td class="paramname">f</td><td>Pointer to field </td></tr>
+    <tr><td class="paramname">idx</td><td>Array index (zero-based) of the element of interest.</td></tr>
   </table>
   </dd>
 </dl>
-<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as a double-precision floating point value, if possible, or else NAN.</dd></dl>
-<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#a79b6df0c30e56eadffc714d458712674">xGetAsLong()</a> </dd></dl>
+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as a double-precision floating point value, if possible, or else NAN. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#aebc8ee4733de2abb4ba41c725a3e6c2b">xGetAsDouble()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a> </dd></dl>
 
-<p class="reference">References <a class="el" href="structXField.html#aaa68a7e140a5370ed0eb52710744c341">XField::isSerialized</a>, <a class="el" href="xchange_8h.html#a8abfcc76130f3f991d124dd22d7e69bc">NAN</a>, <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8h.html#abe0465f7669775b6129551a7ef3300bc">X_BOOLEAN</a>, <a class="el" href="xchange_8h.html#afb01219635d162589ae5aadb90702bb0">X_BYTE</a>, <a class="el" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8h.html#a99605e05158426b1b44e924e42a1162c">X_FLOAT</a>, <a class="el" href="xchange_8h.html#a4003d7fe06200f77805c52cc7db56784">X_INT</a>, <a class="el" href="xchange_8h.html#a36405f1834eb7cd51a17f103b2942e21">X_LONG</a>, <a class="el" href="xchange_8h.html#adb72c72467963a6ace1632638a8a6a7b">X_RAW</a>, <a class="el" href="xchange_8h.html#adfdc22097b12d42c040dcce8700d64b8">X_SHORT</a>, <a class="el" href="xchange_8h.html#a2443dd783d2728a3559361fba845e533">X_STRING</a>, <a class="el" href="xchange_8c.html#ac39ae03ca89b115d49a12f633522dc31">x_trace_null()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, <a class="el" href="xstruct_8c.html#a442f155b0c6549549737510ce42bb66d">xGetField()</a>, and <a class="el" href="xchange_8c.html#adcc86baacb3ddebcc529e269223274b8">xIsCharSequence()</a>.</p>
+<p class="reference">References <a class="el" href="structXField.html#aaa68a7e140a5370ed0eb52710744c341">XField::isSerialized</a>, <a class="el" href="xchange_8h.html#a8abfcc76130f3f991d124dd22d7e69bc">NAN</a>, <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8h.html#abe0465f7669775b6129551a7ef3300bc">X_BOOLEAN</a>, <a class="el" href="xchange_8h.html#afb01219635d162589ae5aadb90702bb0">X_BYTE</a>, <a class="el" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8h.html#a99605e05158426b1b44e924e42a1162c">X_FLOAT</a>, <a class="el" href="xchange_8h.html#a4003d7fe06200f77805c52cc7db56784">X_INT</a>, <a class="el" href="xchange_8h.html#a36405f1834eb7cd51a17f103b2942e21">X_LONG</a>, <a class="el" href="xchange_8h.html#adb72c72467963a6ace1632638a8a6a7b">X_RAW</a>, <a class="el" href="xchange_8h.html#adfdc22097b12d42c040dcce8700d64b8">X_SHORT</a>, <a class="el" href="xchange_8h.html#a2443dd783d2728a3559361fba845e533">X_STRING</a>, <a class="el" href="xchange_8c.html#ac39ae03ca89b115d49a12f633522dc31">x_trace_null()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, <a class="el" href="xstruct_8c.html#ae683dbdc302ce2ce78f77c5301e09386">xGetElementAtIndex()</a>, and <a class="el" href="xchange_8c.html#adcc86baacb3ddebcc529e269223274b8">xIsCharSequence()</a>.</p>
 
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-<a id="a79b6df0c30e56eadffc714d458712674" name="a79b6df0c30e56eadffc714d458712674"></a>
-<h2 class="memtitle"><span class="permalink"><a href="#a79b6df0c30e56eadffc714d458712674">&#9670;&#160;</a></span>xGetAsLong()</h2>
+<a id="ae9fbb705ce77cec34188dd1baf596797" name="ae9fbb705ce77cec34188dd1baf596797"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#ae9fbb705ce77cec34188dd1baf596797">&#9670;&#160;</a></span>xGetAsLong()</h2>
 
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         <tr>
           <td class="memname">long xGetAsLong </td>
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-          <td class="paramtype">const <a class="el" href="structXStructure.html">XStructure</a> *&#160;</td>
-          <td class="paramname"><em>s</em>, </td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em>, </td>
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         <tr>
           <td class="paramkey"></td>
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-          <td class="paramtype">const char *&#160;</td>
-          <td class="paramname"><em>id</em>, </td>
+          <td class="paramtype">long&#160;</td>
+          <td class="paramname"><em>defaultValue</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Return an integer value associated to the field, or else the specified default value if the field cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
+<p>If the field is an array, the first element is converted and returned.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">f</td><td>Pointer to a field. </td></tr>
+    <tr><td class="paramname">defaultValue</td><td>The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as an integer, if possible, or else the specified default value. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#aebc8ee4733de2abb4ba41c725a3e6c2b">xGetAsDouble()</a> </dd></dl>
+
+<p class="reference">References <a class="el" href="xchange_8c.html#a9b61b8b8b3ef0f7cc0b96ab499265c74">x_trace()</a>, and <a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a>.</p>
+
+</div>
+</div>
+<a id="a23cc993336df0815333a58476b472713" name="a23cc993336df0815333a58476b472713"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#a23cc993336df0815333a58476b472713">&#9670;&#160;</a></span>xGetAsLongAtIndex()</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">long xGetAsLongAtIndex </td>
+          <td>(</td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>idx</em>, </td>
         </tr>
         <tr>
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         </tr>
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 </div><div class="memdoc">
-<p>Return an integer value associated to the field by the specified name, or else the specified default value if the field cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
-<p>If the field is an array, the first element is converted and returned.</p>
+<p>Return an integer value associated to the value at the specified array index in the field, or else the specified default value if the element cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
 <dl class="params"><dt>Parameters</dt><dd>
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-    <tr><td class="paramname">id</td><td>Name or aggregate ID of the field to retrieve. </td></tr>
+    <tr><td class="paramname">f</td><td>Pointer to a field. </td></tr>
+    <tr><td class="paramname">idx</td><td>Array index (zero-based) of the element of interest. </td></tr>
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+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as an integer, if possible, or else the specified default value. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#ae9fbb705ce77cec34188dd1baf596797">xGetAsLong()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#aa8cf23d1d1685d5ba1d1b589d1e5c567">xGetAsDoubleAtIndex()</a> </dd></dl>
 
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+<a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a> </dd></dl>
 
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+<p class="reference">References <a class="el" href="structXField.html#aaa68a7e140a5370ed0eb52710744c341">XField::isSerialized</a>, <a class="el" href="xchange_8h.html#a8abfcc76130f3f991d124dd22d7e69bc">NAN</a>, <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8h.html#abe0465f7669775b6129551a7ef3300bc">X_BOOLEAN</a>, <a class="el" href="xchange_8h.html#afb01219635d162589ae5aadb90702bb0">X_BYTE</a>, <a class="el" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8h.html#a99605e05158426b1b44e924e42a1162c">X_FLOAT</a>, <a class="el" href="xchange_8h.html#a4003d7fe06200f77805c52cc7db56784">X_INT</a>, <a class="el" href="xchange_8h.html#a36405f1834eb7cd51a17f103b2942e21">X_LONG</a>, <a class="el" href="xchange_8h.html#adb72c72467963a6ace1632638a8a6a7b">X_RAW</a>, <a class="el" href="xchange_8h.html#adfdc22097b12d42c040dcce8700d64b8">X_SHORT</a>, <a class="el" href="xchange_8h.html#a2443dd783d2728a3559361fba845e533">X_STRING</a>, <a class="el" href="xchange_8c.html#ac39ae03ca89b115d49a12f633522dc31">x_trace_null()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, <a class="el" href="xstruct_8c.html#ae683dbdc302ce2ce78f77c5301e09386">xGetElementAtIndex()</a>, and <a class="el" href="xchange_8c.html#adcc86baacb3ddebcc529e269223274b8">xIsCharSequence()</a>.</p>
 
 </div>
 </div>
-<a id="a79b6df0c30e56eadffc714d458712674" name="a79b6df0c30e56eadffc714d458712674"></a>
-<h2 class="memtitle"><span class="permalink"><a href="#a79b6df0c30e56eadffc714d458712674">&#9670;&#160;</a></span>xGetAsLong()</h2>
+<a id="ae9fbb705ce77cec34188dd1baf596797" name="ae9fbb705ce77cec34188dd1baf596797"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#ae9fbb705ce77cec34188dd1baf596797">&#9670;&#160;</a></span>xGetAsLong()</h2>
 
 <div class="memitem">
 <div class="memproto">
@@ -1044,14 +1080,57 @@ <h2 class="memtitle"><span class="permalink"><a href="#a79b6df0c30e56eadffc714d4
         <tr>
           <td class="memname">long xGetAsLong </td>
           <td>(</td>
-          <td class="paramtype">const <a class="el" href="structXStructure.html">XStructure</a> *&#160;</td>
-          <td class="paramname"><em>s</em>, </td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em>, </td>
         </tr>
         <tr>
           <td class="paramkey"></td>
           <td></td>
-          <td class="paramtype">const char *&#160;</td>
-          <td class="paramname"><em>id</em>, </td>
+          <td class="paramtype">long&#160;</td>
+          <td class="paramname"><em>defaultValue</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Return an integer value associated to the field, or else the specified default value if the field cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
+<p>If the field is an array, the first element is converted and returned.</p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">f</td><td>Pointer to a field. </td></tr>
+    <tr><td class="paramname">defaultValue</td><td>The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing.</td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as an integer, if possible, or else the specified default value. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#aebc8ee4733de2abb4ba41c725a3e6c2b">xGetAsDouble()</a> </dd></dl>
+
+<p class="reference">References <a class="el" href="xchange_8c.html#a9b61b8b8b3ef0f7cc0b96ab499265c74">x_trace()</a>, and <a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a>.</p>
+
+</div>
+</div>
+<a id="a23cc993336df0815333a58476b472713" name="a23cc993336df0815333a58476b472713"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#a23cc993336df0815333a58476b472713">&#9670;&#160;</a></span>xGetAsLongAtIndex()</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">long xGetAsLongAtIndex </td>
+          <td>(</td>
+          <td class="paramtype">const <a class="el" href="structXField.html">XField</a> *&#160;</td>
+          <td class="paramname"><em>f</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>idx</em>, </td>
         </tr>
         <tr>
           <td class="paramkey"></td>
@@ -1066,20 +1145,21 @@ <h2 class="memtitle"><span class="permalink"><a href="#a79b6df0c30e56eadffc714d4
         </tr>
       </table>
 </div><div class="memdoc">
-<p>Return an integer value associated to the field by the specified name, or else the specified default value if the field cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
-<p>If the field is an array, the first element is converted and returned.</p>
+<p>Return an integer value associated to the value at the specified array index in the field, or else the specified default value if the element cannot be represented as an integer. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e.g. <code>float</code> to <code>long</code>), while for string values will attempt to parse an integer value.</p>
 <dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
-    <tr><td class="paramname">s</td><td>Structure from which to retrieve a given field. </td></tr>
-    <tr><td class="paramname">id</td><td>Name or aggregate ID of the field to retrieve. </td></tr>
+    <tr><td class="paramname">f</td><td>Pointer to a field. </td></tr>
+    <tr><td class="paramname">idx</td><td>Array index (zero-based) of the element of interest. </td></tr>
     <tr><td class="paramname">defaultValue</td><td>The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing.</td></tr>
   </table>
   </dd>
 </dl>
-<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as an integer, if possible, or else the specified default value.</dd></dl>
-<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#afbdf1037becd273141c12740949f7956">xGetAsDouble()</a> </dd></dl>
+<dl class="section return"><dt>Returns</dt><dd>The value of the field, represented as an integer, if possible, or else the specified default value. In case of error <code>errno</code> will be set to a non-zero value indicating the type of error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#ae9fbb705ce77cec34188dd1baf596797">xGetAsLong()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#aa8cf23d1d1685d5ba1d1b589d1e5c567">xGetAsDoubleAtIndex()</a> </dd></dl>
 
-<p class="reference">References <a class="el" href="structXField.html#aaa68a7e140a5370ed0eb52710744c341">XField::isSerialized</a>, <a class="el" href="xchange_8h.html#a8abfcc76130f3f991d124dd22d7e69bc">NAN</a>, <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8h.html#abe0465f7669775b6129551a7ef3300bc">X_BOOLEAN</a>, <a class="el" href="xchange_8h.html#afb01219635d162589ae5aadb90702bb0">X_BYTE</a>, <a class="el" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8h.html#a99605e05158426b1b44e924e42a1162c">X_FLOAT</a>, <a class="el" href="xchange_8h.html#a4003d7fe06200f77805c52cc7db56784">X_INT</a>, <a class="el" href="xchange_8h.html#a36405f1834eb7cd51a17f103b2942e21">X_LONG</a>, <a class="el" href="xchange_8h.html#adb72c72467963a6ace1632638a8a6a7b">X_RAW</a>, <a class="el" href="xchange_8h.html#adfdc22097b12d42c040dcce8700d64b8">X_SHORT</a>, <a class="el" href="xchange_8h.html#a2443dd783d2728a3559361fba845e533">X_STRING</a>, <a class="el" href="xchange_8c.html#a9b61b8b8b3ef0f7cc0b96ab499265c74">x_trace()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, <a class="el" href="xstruct_8c.html#a442f155b0c6549549737510ce42bb66d">xGetField()</a>, and <a class="el" href="xchange_8c.html#adcc86baacb3ddebcc529e269223274b8">xIsCharSequence()</a>.</p>
+<p class="reference">References <a class="el" href="structXField.html#aaa68a7e140a5370ed0eb52710744c341">XField::isSerialized</a>, <a class="el" href="xchange_8h.html#a8abfcc76130f3f991d124dd22d7e69bc">NAN</a>, <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8h.html#abe0465f7669775b6129551a7ef3300bc">X_BOOLEAN</a>, <a class="el" href="xchange_8h.html#afb01219635d162589ae5aadb90702bb0">X_BYTE</a>, <a class="el" href="xchange_8h.html#a849c7ccb02f63d8554323a889a3d8b4d">X_DOUBLE</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8h.html#a99605e05158426b1b44e924e42a1162c">X_FLOAT</a>, <a class="el" href="xchange_8h.html#a4003d7fe06200f77805c52cc7db56784">X_INT</a>, <a class="el" href="xchange_8h.html#a36405f1834eb7cd51a17f103b2942e21">X_LONG</a>, <a class="el" href="xchange_8h.html#adb72c72467963a6ace1632638a8a6a7b">X_RAW</a>, <a class="el" href="xchange_8h.html#adfdc22097b12d42c040dcce8700d64b8">X_SHORT</a>, <a class="el" href="xchange_8h.html#a2443dd783d2728a3559361fba845e533">X_STRING</a>, <a class="el" href="xchange_8c.html#a9b61b8b8b3ef0f7cc0b96ab499265c74">x_trace()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, <a class="el" href="xstruct_8c.html#ae683dbdc302ce2ce78f77c5301e09386">xGetElementAtIndex()</a>, and <a class="el" href="xchange_8c.html#adcc86baacb3ddebcc529e269223274b8">xIsCharSequence()</a>.</p>
 
 </div>
 </div>
@@ -1116,7 +1196,10 @@ <h2 class="memtitle"><span class="permalink"><a href="#ae683dbdc302ce2ce78f77c53
   </table>
   </dd>
 </dl>
-<dl class="section return"><dt>Returns</dt><dd>A pointer to the element at the given index, or NULL if there was an error. </dd></dl>
+<dl class="section return"><dt>Returns</dt><dd>A pointer to the element at the given index, or NULL if there was an error.</dd></dl>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#a23cc993336df0815333a58476b472713">xGetAsLongAtIndex()</a> </dd>
+<dd>
+<a class="el" href="xstruct_8c.html#aa8cf23d1d1685d5ba1d1b589d1e5c567">xGetAsDoubleAtIndex()</a> </dd></dl>
 
 <p class="reference">References <a class="el" href="structXField.html#a6535ecc7e6d29e64f0d34cd926823fd9">XField::type</a>, <a class="el" href="structXField.html#a4e9aec275e566b978a3ccb4e043d8c61">XField::value</a>, <a class="el" href="xchange_8c.html#ae73aaf705dc4e7d58dfb0fd81f4805c7">x_error()</a>, <a class="el" href="xchange_8c.html#ac39ae03ca89b115d49a12f633522dc31">x_trace_null()</a>, <a class="el" href="xchange_8c.html#af5ec26d18b20fc0da9ec9032af73fa9e">xElementSizeOf()</a>, and <a class="el" href="xstruct_8c.html#a1720e156de63fd0585224738ccbb5688">xGetFieldCount()</a>.</p>
 
@@ -1156,9 +1239,9 @@ <h2 class="memtitle"><span class="permalink"><a href="#a442f155b0c6549549737510c
   </dd>
 </dl>
 <dl class="section return"><dt>Returns</dt><dd>Matching field from the structure or NULL if there is no match or one of the arguments is NULL.</dd></dl>
-<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#a79b6df0c30e56eadffc714d458712674">xGetAsLong()</a> </dd>
+<dl class="section see"><dt>See also</dt><dd><a class="el" href="xstruct_8c.html#ae9fbb705ce77cec34188dd1baf596797">xGetAsLong()</a> </dd>
 <dd>
-<a class="el" href="xstruct_8c.html#afbdf1037becd273141c12740949f7956">xGetAsDouble()</a> </dd>
+<a class="el" href="xstruct_8c.html#aebc8ee4733de2abb4ba41c725a3e6c2b">xGetAsDouble()</a> </dd>
 <dd>
 <a class="el" href="xlookup_8c.html#a5e3a316b7d0c5c40ed079f3df2d9fcc9">xLookupField()</a> </dd>
 <dd>
diff --git a/apidoc/html/xstruct_8c.js b/apidoc/html/xstruct_8c.js
index b6e8140..11af28a 100644
--- a/apidoc/html/xstruct_8c.js
+++ b/apidoc/html/xstruct_8c.js
@@ -22,8 +22,10 @@ var xstruct_8c =
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     [ "xDestroyStruct", "xstruct_8c.html#afe3fda2f392bae11e136e8c0c90f086d", null ],
     [ "xGetAggregateID", "xstruct_8c.html#a2cbbd824406d862b2018e28a466ff318", null ],
-    [ "xGetAsDouble", "xstruct_8c.html#afbdf1037becd273141c12740949f7956", null ],
-    [ "xGetAsLong", "xstruct_8c.html#a79b6df0c30e56eadffc714d458712674", null ],
+    [ "xGetAsDouble", "xstruct_8c.html#aebc8ee4733de2abb4ba41c725a3e6c2b", null ],
+    [ "xGetAsDoubleAtIndex", "xstruct_8c.html#aa8cf23d1d1685d5ba1d1b589d1e5c567", null ],
+    [ "xGetAsLong", "xstruct_8c.html#ae9fbb705ce77cec34188dd1baf596797", null ],
+    [ "xGetAsLongAtIndex", "xstruct_8c.html#a23cc993336df0815333a58476b472713", null ],
     [ "xGetElementAtIndex", "xstruct_8c.html#ae683dbdc302ce2ce78f77c5301e09386", null ],
     [ "xGetField", "xstruct_8c.html#a442f155b0c6549549737510ce42bb66d", null ],
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diff --git a/apidoc/man/man3/xchange.h.3 b/apidoc/man/man3/xchange.h.3
index b07e3e9..f398e77 100644
--- a/apidoc/man/man3/xchange.h.3
+++ b/apidoc/man/man3/xchange.h.3
@@ -339,10 +339,16 @@ include/xchange.h
 .RI "char * \fBxGetAggregateID\fP (const char *group, const char *key)"
 .br
 .ti -1c
-.RI "double \fBxGetAsDouble\fP (const \fBXStructure\fP *s, const char *id)"
+.RI "double \fBxGetAsDouble\fP (const \fBXField\fP *f)"
 .br
 .ti -1c
-.RI "long \fBxGetAsLong\fP (const \fBXStructure\fP *s, const char *id, long defaultValue)"
+.RI "double \fBxGetAsDoubleAtIndex\fP (const \fBXField\fP *f, int idx)"
+.br
+.ti -1c
+.RI "long \fBxGetAsLong\fP (const \fBXField\fP *f, long defaultValue)"
+.br
+.ti -1c
+.RI "long \fBxGetAsLongAtIndex\fP (const \fBXField\fP *f, int idx, long defaultValue)"
 .br
 .ti -1c
 .RI "void * \fBxGetElementAtIndex\fP (const \fBXField\fP *f, int idx)"
@@ -1061,21 +1067,19 @@ The aggregated ID, or NULL if both arguments were NULL themselves\&.
 
 .PP
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-.SS "double xGetAsDouble (const \fBXStructure\fP * s, const char * id)"
-Return a double-precision floating point value associated to the field by the specified name, or else NAN if the field cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
+.SS "double xGetAsDouble (const \fBXField\fP * f)"
+Return a double-precision floating point value associated to the field, or else NAN if the field cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
 .PP
 If the field is an array, the first element is converted and returned\&.
 .PP
 \fBParameters\fP
 .RS 4
-\fIs\fP Structure from which to retrieve a given field\&. 
-.br
-\fIid\fP Name or aggregate ID of the field to retrieve\&.
+\fIf\fP Pointer to field
 .RE
 .PP
 \fBReturns\fP
 .RS 4
-The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&.
+The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
 .RE
 .PP
 \fBSee also\fP
@@ -1085,34 +1089,88 @@ The value of the field, represented as a double-precision floating point value,
 .PP
 
 .PP
-References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace_null()\fP, \fBxElementSizeOf()\fP, \fBxGetField()\fP, and \fBxIsCharSequence()\fP\&.
-.SS "long xGetAsLong (const \fBXStructure\fP * s, const char * id, long defaultValue)"
-Return an integer value associated to the field by the specified name, or else the specified default value if the field cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+References \fBx_trace_null()\fP, and \fBxGetAsDoubleAtIndex()\fP\&.
+.SS "double xGetAsDoubleAtIndex (const \fBXField\fP * f, int idx)"
+Return a double-precision floating point value associated to the field, or else NAN if the element cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
 .PP
 If the field is an array, the first element is converted and returned\&.
 .PP
 \fBParameters\fP
 .RS 4
-\fIs\fP Structure from which to retrieve a given field\&. 
+\fIf\fP Pointer to field 
 .br
-\fIid\fP Name or aggregate ID of the field to retrieve\&. 
+\fIidx\fP Array index (zero-based) of the element of interest\&.
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsDouble()\fP 
+.PP
+\fBxGetAsLongAtIndex()\fP 
+.RE
+.PP
+
+.PP
+References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace_null()\fP, \fBxElementSizeOf()\fP, \fBxGetElementAtIndex()\fP, and \fBxIsCharSequence()\fP\&.
+.SS "long xGetAsLong (const \fBXField\fP * f, long defaultValue)"
+Return an integer value associated to the field, or else the specified default value if the field cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+.PP
+If the field is an array, the first element is converted and returned\&.
+.PP
+\fBParameters\fP
+.RS 4
+\fIf\fP Pointer to a field\&. 
 .br
 \fIdefaultValue\fP The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing\&.
 .RE
 .PP
 \fBReturns\fP
 .RS 4
-The value of the field, represented as an integer, if possible, or else the specified default value\&.
+The value of the field, represented as an integer, if possible, or else the specified default value\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
 .RE
 .PP
 \fBSee also\fP
 .RS 4
+\fBxGetAsLongAtIndex()\fP 
+.PP
 \fBxGetAsDouble()\fP 
 .RE
 .PP
 
 .PP
-References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace()\fP, \fBxElementSizeOf()\fP, \fBxGetField()\fP, and \fBxIsCharSequence()\fP\&.
+References \fBx_trace()\fP, and \fBxGetAsLongAtIndex()\fP\&.
+.SS "long xGetAsLongAtIndex (const \fBXField\fP * f, int idx, long defaultValue)"
+Return an integer value associated to the value at the specified array index in the field, or else the specified default value if the element cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+.PP
+\fBParameters\fP
+.RS 4
+\fIf\fP Pointer to a field\&. 
+.br
+\fIidx\fP Array index (zero-based) of the element of interest\&. 
+.br
+\fIdefaultValue\fP The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing\&.
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+The value of the field, represented as an integer, if possible, or else the specified default value\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsLong()\fP 
+.PP
+\fBxGetAsDoubleAtIndex()\fP 
+.RE
+.PP
+
+.PP
+References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace()\fP, \fBxElementSizeOf()\fP, \fBxGetElementAtIndex()\fP, and \fBxIsCharSequence()\fP\&.
 .SS "void * xGetElementAtIndex (const \fBXField\fP * f, int idx)"
 Returns a pointer to the array element at the specified index\&.
 .PP
@@ -1125,7 +1183,14 @@ Returns a pointer to the array element at the specified index\&.
 .PP
 \fBReturns\fP
 .RS 4
-A pointer to the element at the given index, or NULL if there was an error\&. 
+A pointer to the element at the given index, or NULL if there was an error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsLongAtIndex()\fP 
+.PP
+\fBxGetAsDoubleAtIndex()\fP 
 .RE
 .PP
 
diff --git a/apidoc/man/man3/xstruct.c.3 b/apidoc/man/man3/xstruct.c.3
index 590a82f..c54f21a 100644
--- a/apidoc/man/man3/xstruct.c.3
+++ b/apidoc/man/man3/xstruct.c.3
@@ -82,10 +82,16 @@ src/xstruct.c \- A collection of commonly used functions for generic structured
 .RI "char * \fBxGetAggregateID\fP (const char *table, const char *key)"
 .br
 .ti -1c
-.RI "double \fBxGetAsDouble\fP (const \fBXStructure\fP *s, const char *id)"
+.RI "double \fBxGetAsDouble\fP (const \fBXField\fP *f)"
 .br
 .ti -1c
-.RI "long \fBxGetAsLong\fP (const \fBXStructure\fP *s, const char *id, long defaultValue)"
+.RI "double \fBxGetAsDoubleAtIndex\fP (const \fBXField\fP *f, int idx)"
+.br
+.ti -1c
+.RI "long \fBxGetAsLong\fP (const \fBXField\fP *f, long defaultValue)"
+.br
+.ti -1c
+.RI "long \fBxGetAsLongAtIndex\fP (const \fBXField\fP *f, int idx, long defaultValue)"
 .br
 .ti -1c
 .RI "void * \fBxGetElementAtIndex\fP (const \fBXField\fP *f, int idx)"
@@ -576,21 +582,19 @@ The aggregated ID, or NULL if both arguments were NULL themselves\&.
 
 .PP
 References \fBx_error()\fP, \fBX_SEP\fP, \fBX_SEP_LENGTH\fP, and \fBxStringCopyOf()\fP\&.
-.SS "double xGetAsDouble (const \fBXStructure\fP * s, const char * id)"
-Return a double-precision floating point value associated to the field by the specified name, or else NAN if the field cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
+.SS "double xGetAsDouble (const \fBXField\fP * f)"
+Return a double-precision floating point value associated to the field, or else NAN if the field cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
 .PP
 If the field is an array, the first element is converted and returned\&.
 .PP
 \fBParameters\fP
 .RS 4
-\fIs\fP Structure from which to retrieve a given field\&. 
-.br
-\fIid\fP Name or aggregate ID of the field to retrieve\&.
+\fIf\fP Pointer to field
 .RE
 .PP
 \fBReturns\fP
 .RS 4
-The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&.
+The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
 .RE
 .PP
 \fBSee also\fP
@@ -600,34 +604,88 @@ The value of the field, represented as a double-precision floating point value,
 .PP
 
 .PP
-References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace_null()\fP, \fBxElementSizeOf()\fP, \fBxGetField()\fP, and \fBxIsCharSequence()\fP\&.
-.SS "long xGetAsLong (const \fBXStructure\fP * s, const char * id, long defaultValue)"
-Return an integer value associated to the field by the specified name, or else the specified default value if the field cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+References \fBx_trace_null()\fP, and \fBxGetAsDoubleAtIndex()\fP\&.
+.SS "double xGetAsDoubleAtIndex (const \fBXField\fP * f, int idx)"
+Return a double-precision floating point value associated to the field, or else NAN if the element cannot be represented as a decimal value\&. This call will use widening conversions as necessary to convert between numerical types (e\&.g\&. \fCshort\fP to \fCdouble\fP), while for string values will attempt to parse a decomal value\&.
 .PP
 If the field is an array, the first element is converted and returned\&.
 .PP
 \fBParameters\fP
 .RS 4
-\fIs\fP Structure from which to retrieve a given field\&. 
+\fIf\fP Pointer to field 
 .br
-\fIid\fP Name or aggregate ID of the field to retrieve\&. 
+\fIidx\fP Array index (zero-based) of the element of interest\&.
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+The value of the field, represented as a double-precision floating point value, if possible, or else NAN\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsDouble()\fP 
+.PP
+\fBxGetAsLongAtIndex()\fP 
+.RE
+.PP
+
+.PP
+References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace_null()\fP, \fBxElementSizeOf()\fP, \fBxGetElementAtIndex()\fP, and \fBxIsCharSequence()\fP\&.
+.SS "long xGetAsLong (const \fBXField\fP * f, long defaultValue)"
+Return an integer value associated to the field, or else the specified default value if the field cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+.PP
+If the field is an array, the first element is converted and returned\&.
+.PP
+\fBParameters\fP
+.RS 4
+\fIf\fP Pointer to a field\&. 
 .br
 \fIdefaultValue\fP The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing\&.
 .RE
 .PP
 \fBReturns\fP
 .RS 4
-The value of the field, represented as an integer, if possible, or else the specified default value\&.
+The value of the field, represented as an integer, if possible, or else the specified default value\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
 .RE
 .PP
 \fBSee also\fP
 .RS 4
+\fBxGetAsLongAtIndex()\fP 
+.PP
 \fBxGetAsDouble()\fP 
 .RE
 .PP
 
 .PP
-References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace()\fP, \fBxElementSizeOf()\fP, \fBxGetField()\fP, and \fBxIsCharSequence()\fP\&.
+References \fBx_trace()\fP, and \fBxGetAsLongAtIndex()\fP\&.
+.SS "long xGetAsLongAtIndex (const \fBXField\fP * f, int idx, long defaultValue)"
+Return an integer value associated to the value at the specified array index in the field, or else the specified default value if the element cannot be represented as an integer\&. This call will use both widening and narrowing conversions, and rounding, as necessary to convert between numerical types (e\&.g\&. \fCfloat\fP to \fClong\fP), while for string values will attempt to parse an integer value\&.
+.PP
+\fBParameters\fP
+.RS 4
+\fIf\fP Pointer to a field\&. 
+.br
+\fIidx\fP Array index (zero-based) of the element of interest\&. 
+.br
+\fIdefaultValue\fP The value to return if the structure contains no field with the specified ID, or if it cannot be represented as an integer though narrowing or widening conversions, rounding, or through parsing\&.
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+The value of the field, represented as an integer, if possible, or else the specified default value\&. In case of error \fCerrno\fP will be set to a non-zero value indicating the type of error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsLong()\fP 
+.PP
+\fBxGetAsDoubleAtIndex()\fP 
+.RE
+.PP
+
+.PP
+References \fBXField::isSerialized\fP, \fBNAN\fP, \fBXField::type\fP, \fBXField::value\fP, \fBX_BOOLEAN\fP, \fBX_BYTE\fP, \fBX_DOUBLE\fP, \fBx_error()\fP, \fBX_FLOAT\fP, \fBX_INT\fP, \fBX_LONG\fP, \fBX_RAW\fP, \fBX_SHORT\fP, \fBX_STRING\fP, \fBx_trace()\fP, \fBxElementSizeOf()\fP, \fBxGetElementAtIndex()\fP, and \fBxIsCharSequence()\fP\&.
 .SS "void * xGetElementAtIndex (const \fBXField\fP * f, int idx)"
 Returns a pointer to the array element at the specified index\&.
 .PP
@@ -640,7 +698,14 @@ Returns a pointer to the array element at the specified index\&.
 .PP
 \fBReturns\fP
 .RS 4
-A pointer to the element at the given index, or NULL if there was an error\&. 
+A pointer to the element at the given index, or NULL if there was an error\&.
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBxGetAsLongAtIndex()\fP 
+.PP
+\fBxGetAsDoubleAtIndex()\fP 
 .RE
 .PP
 
diff --git a/apidoc/xchange.tag b/apidoc/xchange.tag
index 9bbdc88..856273c 100644
--- a/apidoc/xchange.tag
+++ b/apidoc/xchange.tag
@@ -599,15 +599,29 @@
       <type>double</type>
       <name>xGetAsDouble</name>
       <anchorfile>xchange_8h.html</anchorfile>
-      <anchor>afbdf1037becd273141c12740949f7956</anchor>
-      <arglist>(const XStructure *s, const char *id)</arglist>
+      <anchor>aebc8ee4733de2abb4ba41c725a3e6c2b</anchor>
+      <arglist>(const XField *f)</arglist>
+    </member>
+    <member kind="function">
+      <type>double</type>
+      <name>xGetAsDoubleAtIndex</name>
+      <anchorfile>xchange_8h.html</anchorfile>
+      <anchor>aa8cf23d1d1685d5ba1d1b589d1e5c567</anchor>
+      <arglist>(const XField *f, int idx)</arglist>
     </member>
     <member kind="function">
       <type>long</type>
       <name>xGetAsLong</name>
       <anchorfile>xchange_8h.html</anchorfile>
-      <anchor>a79b6df0c30e56eadffc714d458712674</anchor>
-      <arglist>(const XStructure *s, const char *id, long defaultValue)</arglist>
+      <anchor>ae9fbb705ce77cec34188dd1baf596797</anchor>
+      <arglist>(const XField *f, long defaultValue)</arglist>
+    </member>
+    <member kind="function">
+      <type>long</type>
+      <name>xGetAsLongAtIndex</name>
+      <anchorfile>xchange_8h.html</anchorfile>
+      <anchor>a23cc993336df0815333a58476b472713</anchor>
+      <arglist>(const XField *f, int idx, long defaultValue)</arglist>
     </member>
     <member kind="function">
       <type>void *</type>
@@ -1553,15 +1567,29 @@
       <type>double</type>
       <name>xGetAsDouble</name>
       <anchorfile>xstruct_8c.html</anchorfile>
-      <anchor>afbdf1037becd273141c12740949f7956</anchor>
-      <arglist>(const XStructure *s, const char *id)</arglist>
+      <anchor>aebc8ee4733de2abb4ba41c725a3e6c2b</anchor>
+      <arglist>(const XField *f)</arglist>
+    </member>
+    <member kind="function">
+      <type>double</type>
+      <name>xGetAsDoubleAtIndex</name>
+      <anchorfile>xstruct_8c.html</anchorfile>
+      <anchor>aa8cf23d1d1685d5ba1d1b589d1e5c567</anchor>
+      <arglist>(const XField *f, int idx)</arglist>
     </member>
     <member kind="function">
       <type>long</type>
       <name>xGetAsLong</name>
       <anchorfile>xstruct_8c.html</anchorfile>
-      <anchor>a79b6df0c30e56eadffc714d458712674</anchor>
-      <arglist>(const XStructure *s, const char *id, long defaultValue)</arglist>
+      <anchor>ae9fbb705ce77cec34188dd1baf596797</anchor>
+      <arglist>(const XField *f, long defaultValue)</arglist>
+    </member>
+    <member kind="function">
+      <type>long</type>
+      <name>xGetAsLongAtIndex</name>
+      <anchorfile>xstruct_8c.html</anchorfile>
+      <anchor>a23cc993336df0815333a58476b472713</anchor>
+      <arglist>(const XField *f, int idx, long defaultValue)</arglist>
     </member>
     <member kind="function">
       <type>void *</type>