The exact way in which the content of the text:meta-field is generated from RDF metadata is unspecified. ODF 1.2 text:meta-field is a very flexible and generic element, and we don't want to constrain what can be done with it prematurely. This means that ODF consumers are not expected to be able to re-generate the content of arbitrary text:meta-fields; they should only re-generate those meta-fields that they know and recognize (by the describing RDF metadata) and leave the rest alone. It may be a good idea to specify some mechanism by which field content can be generated automatically for simple cases, like e.g. querying a single value from a semantic web database, for a future version of ODF.