[BUG] Handling of special characters

[BirgitBoss]

How: List of performed steps

Import Model to AME

@prefix samm: <urn:samm:org.eclipse.esmf.samm:meta-model:2.1.0#> .
@prefix samm-c: <urn:samm:org.eclipse.esmf.samm:characteristic:2.1.0#> .
@prefix samm-e: <urn:samm:org.eclipse.esmf.samm:entity:2.1.0#> .
@prefix unit: <urn:samm:org.eclipse.esmf.samm:unit:2.1.0#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix : <urn:samm:io.admin-shell.idta.shared:3.1.0#> .

:testSpecialChar a samm:Property ;
   samm:preferredName "organization name"@en ;
   samm:preferredName "Überblick"@de ;
   samm:description "no special characters or if encoded like %23"@en ;
   samm:description "Description soll Sonderzeichen enthalten: # ü ä . see enthält auch Sonderzeichen #"@de ;
   samm:see <urn:irdi:0173-1%2302-ABI002%23003> ;
   samm:characteristic samm-c:Text ;
   samm:exampleValue "Example company" .

After import everything seems fine (the %23 for # are imported but the display shows it in a human friendly way:

Then click "Save" in the property editor on the right side and then export model again. After it looks like this (special char in see attributes now subsituted by not allowed "#" char):

@prefix samm: <urn:samm:org.eclipse.esmf.samm:meta-model:2.1.0#> .
@prefix samm-c: <urn:samm:org.eclipse.esmf.samm:characteristic:2.1.0#> .
@prefix samm-e: <urn:samm:org.eclipse.esmf.samm:entity:2.1.0#> .
@prefix unit: <urn:samm:org.eclipse.esmf.samm:unit:2.1.0#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix : <urn:samm:io.admin-shell.idta.shared:3.1.0#> .

:testSpecialChar a samm:Property ;
   samm:preferredName "Überblick"@de ;
   samm:preferredName "organization name"@en ;
   samm:description "Description soll Sonderzeichen enthalten: # ü ä . see enthält auch Sonderzeichn #"@de ;
   samm:description "no special characters or if encoded like %23"@en ;
   samm:see <urn:irdi:0173-1#02-ABI002#003> ;
   samm:characteristic samm-c:Text ;
   samm:exampleValue "Example company" .