ISAXXMLReader::getFeature Method

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method returns the Boolean value of a feature.

Syntax

HRESULT getFeature(
  const wchar_t* pwchName,
  VARIANT_BOOL* pvfValue
);

Parameters

• pwchName
  [in] Pointer to the feature name (zero-terminated Unicode string).

• pvfValue
  [out, retval] Pointer to the value of the feature (True or False).

Return Value

The following table lists the return values for the getFeature method.

Feature	Returns
namespaces namespace-prefixes	S_OK: Last successful putFeature argument.
external-general-entities external-parameter-entities	S_OK: Last successful putFeature argument.
"normalize-line-breaks"	S_OK: Last successful putFeature argument.
"server-http-request"	S_OK: Last successful putFeature argument.
validation string-interning	S_OK: False
Other features	E_INVALIDARG

Remarks

The feature name is any fully qualified Uniform Resource Identifier (URI). However, at this time, the ISAXXMLReader interface recognizes only the following features and their settings:

• "https://xml.org/sax/features/namespaces"
  • True
    (Default) Perform name space processing.
  • False
    This value has no effect and returns E_FAIL.
  • Access
    Read-only for parsing; read/write when not parsing.
• "https://xml.org/sax/features/namespace-prefixes"
  • True
    Report the original prefixed names and attributes used for namespace declarations in the QNames (qualified names) field.
  • False
    Do not report attributes used for namespace declarations and, optionally, do not report original prefixed names.
  • Access
    Read-only for parsing; read/write when not parsing.
• "https://xml.org/sax/features/external-general-entities"
  • True
    Include all external general (text) entities.
  • False
    (Default) Do not include external general entities.
  • Access
    Read-only for parsing; read/write when not parsing.
• "https://xml.org/sax/features/external-parameter-entities"
  • True 
    Include all external parameter entities, including the external document type definition (DTD) subset.
  • False
    (Default) Do not include any external parameter entities, including the external DTD subset.
  • Access
    Read-only for parsing; read/write when not parsing.
• "normalize-line-breaks"
  • True
    (Default) Normalize CR-LF sequence into single LF per XML 1.0 specifications.
  • False
    Keep CR-LF intact, as usual in COM programming.
  • Access
    Read-only for parsing; read/write when not parsing.
• "server-http-request"
  • True
    Use the server-safe ServerXMLHTTP object for the parseURL method.
  • False
    (Default) Use the WinInet component to get data through HTTP for parseURL.
  • Access
    Read-only for parsing; read/write when not parsing.

The values for the namespaces and namespace-prefixes features may be available only in a specific context, such as before, during, or after a parse.

The reader recognizes the "https://xml.org/sax/features/string-interning" and "https://xml.org/sax/features/validation" features. However, you cannot set these features in the current SAX2 implementation.

The behavior of the reader depends on the values of the namespaces and namespace-prefixes, as shown in the following table.

If namespaces is... and namespace-prefixes is...	True True	True False	False True	False False
Reports name space names	Yes	Yes	Yes*	Illegal
Reports startPrefixMapping and endPrefixMapping events	Yes	Yes	Yes	Illegal
Reports QNames	Yes*	Yes	Yes	Illegal
Reports xmlns attributes	No	Yes	Yes	Illegal

The SAX2 specifications state the implementation must report QNames when the namespace or namespace-prefixes feature is set to False. The namespace and namespace-prefixes features cannot both be set to False.

Requirements

Header	msxml2.h, msxml2.idl
Library	uuid.lib
Windows Embedded CE	Windows CE .NET 4.0 and later
Windows Mobile	Windows Mobile Version 5.0 and later

See Also

Reference

ISAXXMLReader::putFeature Method
ISAXXMLReader