IOpcRelationship::GetId method (msopc.h)

Gets the unique identifier of the relationship.

Syntax

HRESULT GetId(
  [out, retval] LPWSTR *relationshipIdentifier
);

Parameters

[out, retval] relationshipIdentifier

The identifier of the relationship.

The identifier of a relationship is arbitrary and local to the package, and, therefore, .

Valid identifiers conform to the restrictions for xsd:ID, which are documented in section 3.3.8 ID of the W3C Recommendation, XML Schema Part 2: Datatypes Second Edition (http://www.w3.org/TR/xmlschema-2/#ID).

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK
The method succeeded.
E_POINTER
The relationshipIdentifier parameter is NULL.

Remarks

The identifier of a relationship is not useful for finding relationships because it is arbitrary and local to the package.

The definitive way to find a part of interest is by using a relationship type.

Finding a part requires several steps. For detailed information about finding a part, see Finding the Core Properties Part.

This method allocates memory used by the string returned in relationshipIdentifier. If the method succeeds, call the CoTaskMemFree function to free the memory.

For more information about relationships, see the Open Packaging Conventions Fundamentals and the ECMA-376 OpenXML, 1st Edition, Part 2: Open Packaging Conventions (OPC).

Thread Safety

Packaging objects are not thread-safe.

For more information, see the Getting Started with the Packaging API.

Requirements

   
Minimum supported client Windows 7 [desktop apps only]
Minimum supported server Windows Server 2008 R2 [desktop apps only]
Target Platform Windows
Header msopc.h

See also

ECMA-376 OpenXML

External Resources

Finding the Core Properties Part

Getting Started with the Packaging API

IOpcRelationship

IOpcRelationshipSet

Open Packaging Conventions Fundamentals

Overviews

Packaging API Reference

Packaging API Samples

Reference

Relationships Overview

W3C Recommendation, XML Schema Part 2: Datatypes Second Edition