Split of normative part.

chapters/annotations.tex

@@ -4,9 +4,7 @@ \chapter{Annotations}\label{annotations}
 Annotations are intended for storing extra information about a model,
 such as graphics, documentation or versioning, etc. A Modelica tool is
 free to define and use other annotations, in addition to those defined
-here, according to \cref{vendor-specific-annotations}. The only requirement is that any tool
-shall save files with all annotations from this chapter and all
-vendor-specific annotations intact. To ensure this, annotations must be
+here, according to \cref{vendor-specific-annotations}. Annotations must be
 represented with constructs according to the Modelica grammar (for
 replaceable class declarations with a constraining-clause also refer to
 \cref{constraining-clause-annotations}). The specification in this document defines the
@@ -16,7 +14,9 @@ \section{Vendor-Specific Annotations}\label{vendor-specific-annotations}
 
 A vendor may -- anywhere inside an annotation -- add specific, possibly
 undocumented, annotations which are not intended to be interpreted by
-other tools. Two variants of vendor-specific annotations exist; one
+other tools. The only requirement is that any tool
+shall save files with all vendor-specific annotations (and all annotations from this chapter) intact.
+Two variants of vendor-specific annotations exist; one
 simple and one hierarchical. Double underscore concatenated with a
 vendor name as initial characters of the identifier are used to identify
 vendor-specific annotations.