DICOM PS3.8 2018d - Network Communication Support for Message Exchange

B.3.2 Privately Defined Abstract and Transfer Syntax Names (Current)
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### B.3.2 Privately Defined Abstract and Transfer Syntax Names

Privately defined Abstract and Transfer Syntax Names may also be used, however, they will not be registered by NEMA. Organizations that define private Abstract and Transfer Syntax Names are responsible to obtain their proper registration defined for OSI Object Identifiers. National Standards Organizations representing a number of countries (e.g., UK, France, Germany, Japan, USA, etc.) to the International Standards Organization act as a registration authority as defined by ISO 9834-1.

### Note

For example, in the USA, ANSI assigns (for a fee) Organization Identifiers to any requesting organization. This identifier is made of a series of four numeric components; 1 (identifies ISO), 2 (identifies the ISO member bodies branch), 840 (identifies ANSI as the ISO member body representing the USA), and xxxxxx (identifies a specific organization and is issued by ANSI). Such an identifier may be used by the identified organization as a root to which it may add a suffix made of one or more numeric components. The identified organization accepts the responsibility to properly register these suffixes to ensure uniqueness.

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DICOM PS3.8 2018d - Network Communication Support for Message Exchange