Update the recipe to create prefix.ttl

examples/MetaNetX/README.md

@@ -1,12 +1,9 @@
-Examples extracted from rdf.metantex.org
+`prefix.ttl` was automatically generated as follow:
 
-```js
-var examplesh2=
-document.querySelectorAll('#mnx_view  ol > li');
-for (var i=0;i< examplesh2.length;i++) {
-    let q=examplesh2[i].getElementsByTagName('button')[0].attributes['onclick'].nodeValue; 
-    console.log("prefix ex: <https://sparql.metanetx.org/.well-known/sparql-examples/>\nprefix sh: <http://www.w3.org/ns/shacl#>\nprefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\nprefix rdfs:<http://www.w3.org/2000/01/rdf-schema#>\nprefix schema: <https://schema.org/>\nex:"+(i+1)+"\na sh:SPARQLSelectExecutable, sh:SPARQLExecutable ;\n    sh:prefixes _:sparql_examples_prefixes, _:metanetx_sparql_examples_prefixes ;\n    schema:target <https://rdf.metanetx.org/sparql/> ;\n    rdfs:comment '''"+examplesh2[i].firstChild.data.trim()+"''' ; \n  sh:select '''"+q.substring(40, q.length -1).trim().replaceAll("\\n","\n")+"'''.");
-}
+```{bash}
+git clone https://github.com/MetaNetX/MNXtools.git MNXtools
+cd MNXtools/perl
+perl -e 'use lib "."; use Prefix; print Prefix->new()->get_prefix_ontology()' > prefix.ttl
 ```