Other developments are continuing, notably through the OntologyX semantic engineering tools and services from [http://www.rightscom.com Rightscom]. The approach also has much in common with the [http://cidoc.ics.forth.gr/index.html CIDOC Conceptual Reference Model (CRM)], an ontology for cultural heritage information, and the [[FRBR|Functional Requirements for Bibliographic Records (FRBR)]] model in the library world.
In June 2009 a new initiative, the [http://wwwcdlr.jiscstrath.ac.uk/whatwedo/projectsVMF/vocab-framework.aspx Vocabulary Mapping Framework (VMF)], was announced by a consortium of partners. ThisFunded by [http://www.jisc.ac.uk/whatwedo/projects/vocab-framework.aspx JISC], this will create an extensive and authoritative mapping of vocabularies from nine major content metadata standards, creating a downloadable tool to support interoperability across communities. The mapping will also be extensible to other standards. The work builds on the principles of interoperability established in the indecs Content Model, and is an expansion of the existing [http://dx.doi.org/10.1045/january2007-dunsire RDA/ONIX Framework for Resource Categorization] into a comprehensive vocabulary of resource relators and categories, which will be a superset of those used in major standards from the publisher/producer, education and bibliographic/heritage communities. The International DOI Foundation, which fully endorses this work, will provide a web hosting facility for the Framework as part of its commitment to promoting the wider use of interoperable metadata, and will use the vocabulary mapping wherever possible to support the association of metadata with DOI names <ref>[http://www.doi.org/news/DOINewsJun09.html#1''DOI News: Launch of “Vocabulary Mapping Framework”]</ref>
