diff --git a/SERVER.md b/SERVER.md
index 1dd9516..f51ce85 100644
--- a/SERVER.md
+++ b/SERVER.md
@@ -96,6 +96,8 @@ This is where the datahub-connectors would look for showcase-relevant instances.
    - <http://opcfoundation.org/UA/MachineTools/>
    - `your custom namespace(s) for you instance(s)`
 
+   Your custom instance namespace **must not** contain references to any other namespace (e.g. instantiation a different companion specification in this namespace is not allowed).
+
    (optional: to enable use of an UA base NodeSet without the added *OrderedListType* object, needed by the IA and MachineTools release candidate specifications)
 
 4. If the computer, where the OpenVPN Client runs is accessible, try connecting to your OPC UA Server via the Open VPN IP-address (begins with 10.80.0.). If no OPC UA Client is available on this computer, basic connection test can also be done by using telnet, by `telnet 10.80.0.XX 4840` .
diff --git a/Specs/Fairs.md b/Specs/Fairs.md
index 017a6c1..f5f08f0 100644
--- a/Specs/Fairs.md
+++ b/Specs/Fairs.md
@@ -2,10 +2,10 @@
 
 | Shortname | Year | Description | Website |
 | --- | --- | --- | --- |
-| Virtual | permanent | Permanent virtual fair | <https://umati.app> |
+| VIRTUAL | permanent | Permanent virtual fair | <https://umati.app> |
 | GRIND | 2020 | Grindtec Augsburg 2020 | <https://www.grindtec.de/> |
 | SPS | 2020 | SPS Nürnberg 2020 | <https://sps.mesago.com/nuernberg/de.html> |
 | METAV | 2021 | METAV 2020 reloaded | <https://metav.de> |
 | HMI | 2021 | Hannover Messe 2021 | <https://www.hannovermesse.de/> |
-| AMB | 2022 | AMB Stuttgart 2021 | <https://www.messe-stuttgart.de/amb/> |
 | EMO | 2021 | EMO Milano 2021 | <https://emo-milano.com/> |
+| AMB | 2022 | AMB Stuttgart 2022 | <https://www.messe-stuttgart.de/amb/> |
diff --git a/Specs/MACHINETOOLS.md b/Specs/MACHINETOOLS.md
index d17ad17..0d44b6e 100644
--- a/Specs/MACHINETOOLS.md
+++ b/Specs/MACHINETOOLS.md
@@ -63,7 +63,7 @@ To fill the demo dashboard machine page with the most content the variables mark
 | 0:HasProperty | Variable | 2:Model | 0:LocalizedText | 0:PropertyType | **M**, RO |
 | 0:HasProperty | Variable | 2:ProductCode | 0:String | 0:PropertyType | **M**, RO |
 | 0:HasProperty | Variable | 2:HardwareRevision | 0:String | 0:PropertyType | O, RO |
-| 0:HasProperty | Variable | 2:SoftwareRevision | 0:String | 0:PropertyType | O, RO |
+| 0:HasProperty | Variable | 2:SoftwareRevision | 0:String | 0:PropertyType | **M**, RO |
 | 0:HasProperty | Variable | 2:DeviceClass | 0:String | 0:PropertyType | O, RO |
 | 0:HasProperty | Variable | 2:SerialNumber | 0:String | 0:PropertyType | M, RO |
 | 0:HasProperty | Variable | YearOfConstruction | UInt16 | 0:PropertyType | **M**, RO |
diff --git a/index.md b/index.md
index b63ea2e..bbc3724 100644
--- a/index.md
+++ b/index.md
@@ -25,13 +25,15 @@ This documentation is versioned, as some content details will be delivered later
 | V 0.01.00 | 08.07.2020 | First draft|
 | V 1.00.00 | 21.07.2020 | First release |
 | V 1.01.00 | 11.08.2020 | Update on Machine Tools and Fairs |
+| V 1.02.00 | 28.08.2020 | Update on Machine Tools and Fairs |
 
 ### Changelog
 
 | Doc | Area | Description | Commit |
 | --- | --- | --- | --- |
+| [MachineTools](Specs/MACHINETOOLS.md) | Fair Specification | SoftwareRevision mandatory | [117ce4b](https://github.com/umati/Showcase/pull/16/commits/117ce4bde7a57574de1240e76d2d3aa1160bd517) |
 | [MachineTools](Specs/MACHINETOOLS.md) | NodeSets for Machine Tools | Clarification on prototyping nodeset for showcase | [a2c4926](https://github.com/umati/Showcase/commit/a2c49264ca66caf6813de1ad8a5706d83ec3aa46) [7628b8a](https://github.com/umati/Showcase/commit/7628b8af38c41da2e01dac70f3d8f8be44f8949c) |
-| [Fairs](Specs/Fairs.md) | Shortnames | Update of the fair shortnames | [084e061](https://github.com/umati/Showcase/commit/084e0611be0bf4618e17c07260dd24d397e31ce0) |
+| [Fairs](Specs/Fairs.md) | Shortnames | Update of the fair shortnames | [084e061](https://github.com/umati/Showcase/commit/084e0611be0bf4618e17c07260dd24d397e31ce0) [7a63e15](https://github.com/umati/Showcase/pull/16/commits/7a63e15d3e0fe691630e07814ad9e82dfe2f92b0) |
 
 ## Demonstrator story umati showcase