The ODT structure stores information about an OLE object. Each OLE object in a Word Binary file is stored in a storage within the ObjectPool storage. Each of these storages has an ObjInfo stream which contains an ODT structure.
ODTPersist1 (2 bytes): An ODTPersist1 structure that specifies information about the OLE object.
cf (2 bytes): An unsigned integer that specifies the format this OLE object uses to transmit data to the host application. Valid values and their meanings are:
Rich Text Format
Metafile or Enhanced Metafile, depending on ODTPersist2.fStoredAsEMF
Device Independent Bitmap
Unicode text format
ODTPersist2 (2 bytes): An ODTPersist2 structure that specifies additional information about the OLE object. This member does not exist if the ObjInfo stream containing this ODT structure is not large enough to accommodate it.