B.3 DICOM Abstract and Transfer Syntax Names Encoding and Registration
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## B.3 DICOM Abstract and Transfer Syntax Names Encoding and Registration

The Abstract and Transfer Syntax Name structure is based on the OSI Object Identification (numeric form) as defined by ISO 8824. Abstract and Transfer Syntax Names are registered values as defined by ISO 9834-1 to ensure global uniqueness. Abstract and Transfer Syntax Names are encoded as defined in ISO 8825 (Object Identifiers of numeric form) when the OSI network communication support is used as defined in Section 8. They are encoded as defined in Annex F when the TCP/IP network communication support is used as defined in Section 9.

### B.3.1 DICOM Registered Abstract and Transfer Syntax Names

The organization responsible for the definition and registration of DICOM Abstract and Transfer Syntax Names is NEMA. NEMA guarantees uniqueness for all DICOM Abstract and Transfer Syntax Names. A choice of DICOM registered Abstract and Transfer Syntax Names related to a specific version of the DICOM Application Entities, as well as the associated negotiation rules, are defined in PS3.4 for Abstract Syntaxes and PS3.5 for Transfer Syntaxes.

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