Domeo and Annotation Ontology
Domeo promotes annotation sharing through the Annotation Ontology (AO) RDF model. AO is an OWL ontology providing a model for creating ‘stand-off’ annotation anchored to online resources such as documents, images and databases and their fragments. AO provides a robust set of methods for linking online resources, for example text in scientific publications, to ontological elements, with full representation of the annotation provenance. Through AO, existing domain ontologies and vocabularies – in OWL or SKOS - can be utilized, out of the box, for creating extremely rich stores of metadata on web resources. In the bio-medical field, subjects for ontological structuring include biological processes, molecular functions, anatomical and cellular structures, tissue and cell types, chemical compounds, and biological entities such as genes and proteins. However, AO is not limited to the bio-medical domain and can be easily used in other scientific and non-scientific contexts.
Annotation ToolKIT

