correct link (#506)

* correct link

* grammar

documentation/IDTA-01001/modules/ROOT/pages/spec-metamodel/designators.adoc

@@ -19,6 +19,6 @@ To understand the specifications, it is crucial to understand the common attribu
 They are reused throughout the specifications of the other classes ("inherits from") and define important concepts like identifiable, qualifiable, etc.
 They are abstract, i.e. there is no object instance of such classes.
 
-The concept of referencing and how a reference is represented in the UML diagrams and the tables is explained in Clause xref:spec-metamodel/environment.adoc[] and Annex xref:ROOT:annex/uml.adoc[].
+The concept of referencing and how a reference is represented in the UML diagrams and the tables is explained in Clause xref:spec-metamodel/referencing.adoc[] and Annex xref:ROOT:annex/uml.adoc[].
 
 Constraints that are no invariants of classes are specified in Clause xref:spec-metamodel/constraints.adoc[].

documentation/IDTA-01001/modules/ROOT/pages/spec-metamodel/index.adoc

@@ -13,7 +13,8 @@ SPDX-License-Identifier: CC-BY-4.0
 
 This clause specifies the information metamodel of the Asset Administration Shell.
 
-An overview of the metamodel of the Asset Administration Shell is given in Subclause xref:spec-metamodel/overview.adoc[]; Subclause xref:spec-metamodel/designators.adoc[] describes the classes and all their attributes in detail.
+An overview of the metamodel of the Asset Administration Shell is given in Subclause xref:spec-metamodel/overview.adoc[].
+Subclause xref:spec-metamodel/designators.adoc[] describes the classes and all their attributes in detail.
 
 The legend of the UML diagrams and the table specification of the classes is explained in Annex xref:annex/uml-templates.adoc[] and Annex xref:annex/uml.adoc[].
 Readers familiar with UML may skip xref:annex/uml.adoc#omg-uml-general[OMG UML General].