add note that implementations may differ

Co-authored-by: s-heppner <[email protected]>

documentation/IDTA-01001/modules/ROOT/pages/general.adoc

@@ -444,6 +444,7 @@ This semantic ID helps to easily find the semantic definition of the submodel (s
 
 When comparing two elements, different use cases should be considered in order to define how these two elements are semantically related.
 This clause gives first hints on the aspects to consider when dealing with matching semantic identifiers.
+The actual implementations in applications may differ from the strategies presented here. 
 For example, semantic references including context information as represented in IRDI-Path in ECLASS are not yet considered.
 Sometimes a concept description is derived from another concept description or is identical to or at least compatible with another concept description.