Kepler

EML200DataSource actors can currently be annotated on the canvas with semantic
annotations. This essentially marks up the various ports (aka attributes) with
terms and expressions from an ontology. We need to be able to serialize these
changes into an EML document and put the new document onto the ecoGrid in place
of the original, as a new version. Then we need to be able to deserialize the
annotation fromthe EML when the EML is parsed from a new actor so that the
annotations show up on the canvas when it is put there.

To do this, we need to decide the serialization syntax for the annotations in
EML and decide how this syntax relates to existing semantic information that is
already in EML such as the unit information, etc.