DDS-XTypes 1.3：可扩展与动态主题类型标准

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xvi DDS-XTypes, version 1.3

• CORBA Component Model (CCM)

Platform Specific Model and Interface Specifications

• CORBA services

• CORBA facilities

• OMG Domain specifications

• OMG Embedded Intelligence specifications

• OMG Security specifications

All of the OMG’s formal specifications may be downloaded without charge from our website.

(Products implementing OMG specifications are available from individual suppliers.) Copies of

specifications, available in PostScript and PDF format, may be obtained from the Specifications

Catalog cited above or by contacting the Object Management Group, Inc. at:

OMG Headquarters

109 Highland Avenue

Needham, MA 02494, USA

Tel: +1-781-444-0404

Fax: +1-781-444-0320

Email: pubs@omg.org

Certain OMG specifications are also available as ISO standards. Please consult

https://www.iso.org/.

Typographical Conventions

The type styles shown below are used in this document to distinguish programming statements

from ordinary English. However, these conventions are not used in tables or section headings

where no distinction is necessary.

Times/Times New Roman - 10 pt.: Standard body text

Helvetica/Arial - 10 pt. Bold: OMG Interface Definition Language (OMG IDL) and

syntax elements.

Courier - 10 pt. Bold: Programming language elements.

Helvetica/Arial - 10 pt: Exceptions

Terms that appear in italics are defined in the glossary. Italic text also represents the name of a

document, specification, or other publication.

Issues

The reader is encouraged to report any technical or editing issues/problems with this

specification to https://issues.omg.org/issues/create-new-issue.

4 DDS-XTypes, version 1.3

2.2 Network Interoperability Conformance

There are two Network Interoperability conformance profiles. An implementation may claim

conformance to the Minimal profile or to the Basic profile, which extends the Minimal.

Regardless of profile, conformance with respect to network interoperability requires

conformance to the Real-Time Publish-Subscribe Wire Protocol specification [RTPS].

2.2.1 Minimal Network Interoperability Profile

Conformance with the Minimal Network Interoperability profile requires conformance with the

following clauses of this specification:

• “Representing Types with TypeIdentifier and TypeObject” (Clause 7.3.4)

• From “Use of the Type System by DDS" (Clause 7.6)

o “Topic Model” (Clause 7.6.1)

o “Discovery and Endpoint Matching” (Clause 7.6.3) excluding “Built-in

TypeLookup service” (Clause 7.6.3.3)

 Clause 7.6.3.1.1 “DataRepresentationQosPolicy: Conceptual Model”,

with support limited to version 2 encoding.

o “Interoperability of Keyed Topics” (Clause 7.6.8)

• “Extended CDR Representation (encoding version 2)” (Clause 7.4.2)

• “Extended CDR encoding virtual machine” (Clause 7.4.3)

• Annex B: Representing Types with TypeObject

• Annex D: DDS Built-in Topic Data Types

2.2.2 Basic Network Interoperability Profile

This profile adds type safety to the Minimal profile. It enables checking type compatibility

between published and subscribed types as a precondition for matching the endpoints.

Conformance with the Basic Network Interoperability Profile requires conformance with the

Minimal Network Interoperability profile and the following clauses:

• “Built-in TypeLookup service” (Clause 7.6.3.3)

2.3 Optional XTYPES 1.1 Interoperability Profile

This profile adds interoperability with implementations that conform with version 1.1 of the

XTYPES specification.

Conformance with the XTYPES 1.1 Interoperability Profile requires conformance with the Basic

Network Interoperability profile and support of version 1 encoding in Clause 7.6.3.1.1

“DataRepresentationQosPolicy: Conceptual Model.”

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