An unordered collection of annotation attached to objects in the OME data model. The AnnotationRef element is a reference to an element derived from the SA:CommonAnnotation element. abstract An annotation from which the other are derived. A description for the annotation. [plane text multi-line string] We recommend the inclusion of a namespace for annotations you define. If it is absent then we assume the annotation is to use our (OME's) default interpretation for this type. A file object annotation An general xml annotation. The contents of this is not processed as OME XML but should still be well-formed XML. This annotation is a grouping object. It uses the sequence of annotation refs from the base Annotation to form the list. A simple comment annotation A simple numerical annotation of type xsd:long A simple numerical annotation of type xsd:double A simple boolean annotation of type xsd:boolean A date/time annotation of type xsd:dateTime A tag annotation (represents a tag or a tagset) A ontology term annotation