= Type_fileformat  =

Type_fileformat is a subtype of [[DataModel/Type DOMS object| Type_DOMS]]. Format hierarchies are possible; i.e. Type Fileformat defines the 'extendsFormat' relation (e.g. '24 bit baseline tiff' extendsFormat 'baseline tiff' extendsFormat 'tiff'). Type Fileformat also defines the !TechnicalSpecification datastream. Say object A ''isObjectType'' Fileformat. Then when an object B ''isObjectType'' File and ''isFileFormat'' A, the !TechnicalSpecification datastream in A describes the legal content of the ''Technical'' datastream in B.

Extensions to [[DataModel/Type DOMS object| Type DOMS]]
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  .'''Datastreams'''
    .'''Relations''' [[DataModel/Datastream Relations| RDF relations]] to other objects (''RELS-EXT'')
      .'''?extendsFormat -> Type_fileformat''' 
    .'''!TechnicalSpecification''' Datastream containing the nessesary information to understand the content in the ''Technical'' datastream in a [[DataModel/Type file| Type file]] object

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The FoxML object can be found [[http://merkur/viewvc/trunk/data/doms_base_collection/domsBaseTypeFileformat.xml?root=doms&view=markup|here]]

The Default file objects can be found [[http://merkur/viewvc/trunk/data/doms_base_collection/Fileformats/?root=doms|here]]