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+## libimagannotation
+
+This library provides annotation functionality for entries.
+
+Annotations are normal Store entries, but their header at
+`annotation.is_annotation` is set to `true`.
+
+Annotations are linked to an entry (as in `libimagentrylink`).
+
+### Library functionality
+
+The library features two traits: One to extend an `Entry` with annotation
+functionality and another one for extending the `Store` with functionality to
+get annotations of an entry and all annotations in the store.
+