ISAXXMLReader::getFeature Method (Compact 2013)

3/26/2014

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:

• "http://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.
• "http://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.
• "http://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.
• "http://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 "http://xml.org/sax/features/string-interning" and "http://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

See Also

Reference

ISAXXMLReader
ISAXXMLReader::putFeature Method