java.lang.Object
- net.sf.saxon.FeatureKeys

```
public class FeatureKeys
extends java.lang.Object
```
FeatureKeys defines a set of constants, names of Saxon configuration options which can be supplied to the Saxon implementations of the JAXP interfaces TransformerFactory, SchemaFactory, Validator, and ValidationHandler.

Author:

Michael H. Kay

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`ALLOW_EXTERNAL_FUNCTIONS`	ALLOW_EXTERNAL_FUNCTIONS must be a Boolean; it determines whether calls to external functions are allowed
`static java.lang.String`	`COLLATION_URI_RESOLVER`	COLLATION_URI_RESOLVER must be a `CollationURIResolver`.
`static java.lang.String`	`COLLECTION_URI_RESOLVER`	COLLECTION_URI_RESOLVER must be a `CollectionURIResolver`.
`static java.lang.String`	`COMPILE_WITH_TRACING`	COMPILE_WITH_TRACING must be a Boolean.
`static java.lang.String`	`DTD_VALIDATION`	DTD_VALIDATION must be a Boolean.
`static java.lang.String`	`LINE_NUMBERING`	LINE_NUMBERING must be a Boolean(); it determines whether line numbers are maintained for the source document
`static java.lang.String`	`MESSAGE_EMITTER_CLASS`	MESSAGE_EMITTER_CLASS must be the class name of an Emitter
`static java.lang.String`	`NAME_POOL`	NAME_POOL must be an instance of net.sf.saxon.om.NamePool
`static java.lang.String`	`OUTPUT_URI_RESOLVER`	OUTPUT_URI_RESOLVER must be an instance of net.sf.saxon.OutputURIResolver
`static java.lang.String`	`RECOGNIZE_URI_QUERY_PARAMETERS`	RECOGNIZE_URI_QUERY_PARAMETERS must be a Boolean; it determines whether query parameters (things after a question mark) in a URI passed to the document() or doc() function are specially recognized by the system default URIResolver.
`static java.lang.String`	`RECOVERY_POLICY`	RECOVERY_POLICY must be an Integer: Controller.RECOVER_SILENTLY, Controller.RECOVER_WITH_WARNINGS, or Controller.DO_NOT_RECOVER
`static java.lang.String`	`SCHEMA_VALIDATION`	SCHEMA_VALIDATION must be a Boolean.
`static java.lang.String`	`SOURCE_PARSER_CLASS`	SOURCE_PARSER_CLASS must be the full class name of an XMLReader.
`static java.lang.String`	`STRIP_WHITESPACE`	STRIP_WHITESPACE must be a string set to one of the values "all", "none", or "ignorable".
`static java.lang.String`	`STYLE_PARSER_CLASS`	STYLE_PARSER_CLASS must be an XMLReader.
`static java.lang.String`	`TIMING`	TIMING must be an Boolean; it determines whether basic timing information is output to System.err
`static java.lang.String`	`TRACE_EXTERNAL_FUNCTIONS`	TRACE_EXTERNAL_FUNCTIONS must be a Boolean; it determines whether the loading and binding of extension functions is traced
`static java.lang.String`	`TRACE_LISTENER`	TRACE_LISTENER must be an instance of a class that implements `TraceListener`.
`static java.lang.String`	`TREE_MODEL`	TREE_MODEL must be an Integer: Builder.STANDARD_TREE or Builder.TINY_TREE
`static java.lang.String`	`VALIDATION_WARNINGS`	VALIDATION_WARNINGS must be a Boolean.
`static java.lang.String`	`VERSION_WARNING`	VERSION_WARNING must be a Boolean.
`static java.lang.String`	`XML_VERSION`	XML_VERSION is a character string.

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ALLOW_EXTERNAL_FUNCTIONS
```
public static final java.lang.String ALLOW_EXTERNAL_FUNCTIONS
```
    ALLOW_EXTERNAL_FUNCTIONS must be a Boolean; it determines whether calls to external functions are allowed
    
    See Also:
    
    Constant Field Values
  - COLLATION_URI_RESOLVER
```
public static final java.lang.String COLLATION_URI_RESOLVER
```
    COLLATION_URI_RESOLVER must be a CollationURIResolver. This resolver will be used to resolve collation URIs used in stylesheets compiled or executed under the control of this TransformerFactory
    
    See Also:
    
    Constant Field Values
  - COLLECTION_URI_RESOLVER
```
public static final java.lang.String COLLECTION_URI_RESOLVER
```
    COLLECTION_URI_RESOLVER must be a CollectionURIResolver. This resolver will be used to resolve collection URIs used in calls of the collection() function
    
    See Also:
    
    Constant Field Values
  - COMPILE_WITH_TRACING
```
public static final java.lang.String COMPILE_WITH_TRACING
```
    COMPILE_WITH_TRACING must be a Boolean. If true, stylesheets and queries are compiled with tracing enabled, but the choice of a trace listener is deferred until run time (see Controller.addTraceListener(net.sf.saxon.trace.TraceListener))
    
    See Also:
    
    Constant Field Values
  - DTD_VALIDATION
```
public static final java.lang.String DTD_VALIDATION
```
    DTD_VALIDATION must be a Boolean. This determines whether source documents should be parsed with DTD-validation enabled.
    
    See Also:
    
    Constant Field Values
  - LINE_NUMBERING
```
public static final java.lang.String LINE_NUMBERING
```
    LINE_NUMBERING must be a Boolean(); it determines whether line numbers are maintained for the source document
    
    See Also:
    
    Constant Field Values
  - MESSAGE_EMITTER_CLASS
```
public static final java.lang.String MESSAGE_EMITTER_CLASS
```
    MESSAGE_EMITTER_CLASS must be the class name of an Emitter
    
    See Also:
    
    Constant Field Values
  - NAME_POOL
```
public static final java.lang.String NAME_POOL
```
    NAME_POOL must be an instance of net.sf.saxon.om.NamePool
    
    See Also:
    
    Constant Field Values
  - OUTPUT_URI_RESOLVER
```
public static final java.lang.String OUTPUT_URI_RESOLVER
```
    OUTPUT_URI_RESOLVER must be an instance of net.sf.saxon.OutputURIResolver
    
    See Also:
    
    Constant Field Values
  - RECOGNIZE_URI_QUERY_PARAMETERS
```
public static final java.lang.String RECOGNIZE_URI_QUERY_PARAMETERS
```
    RECOGNIZE_URI_QUERY_PARAMETERS must be a Boolean; it determines whether query parameters (things after a question mark) in a URI passed to the document() or doc() function are specially recognized by the system default URIResolver. Allowed parameters include, for example validation=strict to perform schema validation, and strip-space=yes to perform stripping of all whitespace-only text nodes.
    
    See Also:
    
    Constant Field Values
  - RECOVERY_POLICY
```
public static final java.lang.String RECOVERY_POLICY
```
    RECOVERY_POLICY must be an Integer: Controller.RECOVER_SILENTLY, Controller.RECOVER_WITH_WARNINGS, or Controller.DO_NOT_RECOVER
    
    See Also:
    
    Constant Field Values
  - SCHEMA_VALIDATION
```
public static final java.lang.String SCHEMA_VALIDATION
```
    SCHEMA_VALIDATION must be a Boolean. This determines whether source documents should be parsed with schema-validation enabled.
    
    See Also:
    
    Constant Field Values
  - SOURCE_PARSER_CLASS
```
public static final java.lang.String SOURCE_PARSER_CLASS
```
    SOURCE_PARSER_CLASS must be the full class name of an XMLReader. This identifies the parser used for source documents.
    
    See Also:
    
    Constant Field Values
  - STRIP_WHITESPACE
```
public static final java.lang.String STRIP_WHITESPACE
```
    STRIP_WHITESPACE must be a string set to one of the values "all", "none", or "ignorable". This determines what whitespace is stripped during tree construction: "all" removes all whitespace-only text nodes; "ignorable" removes whitespace text nodes in element-only content (as identified by a DTD or Schema), and "none" preserves all whitespace. This whitespace stripping is additional to any stripping caused by the xsl:strip-space declaration in a stylesheet.
    
    See Also:
    
    Constant Field Values
  - STYLE_PARSER_CLASS
```
public static final java.lang.String STYLE_PARSER_CLASS
```
    STYLE_PARSER_CLASS must be an XMLReader. This identifies the parser used for stylesheets and schema modules.
    
    See Also:
    
    Constant Field Values
  - TIMING
```
public static final java.lang.String TIMING
```
    TIMING must be an Boolean; it determines whether basic timing information is output to System.err
    
    See Also:
    
    Constant Field Values
  - TRACE_EXTERNAL_FUNCTIONS
```
public static final java.lang.String TRACE_EXTERNAL_FUNCTIONS
```
    TRACE_EXTERNAL_FUNCTIONS must be a Boolean; it determines whether the loading and binding of extension functions is traced
    
    See Also:
    
    Constant Field Values
  - TRACE_LISTENER
```
public static final java.lang.String TRACE_LISTENER
```
    TRACE_LISTENER must be an instance of a class that implements TraceListener. Setting this property automatically sets COMPILE_WITH_TRACING to true.
    
    See Also:
    
    Constant Field Values
  - TREE_MODEL
```
public static final java.lang.String TREE_MODEL
```
    TREE_MODEL must be an Integer: Builder.STANDARD_TREE or Builder.TINY_TREE
    
    See Also:
    
    Constant Field Values
  - VALIDATION_WARNINGS
```
public static final java.lang.String VALIDATION_WARNINGS
```
    VALIDATION_WARNINGS must be a Boolean. This determines whether validation errors in result documents should be treated as fatal. By default they are fatal; with this option set, they are treated as warnings.
    
    See Also:
    
    Constant Field Values
  - VERSION_WARNING
```
public static final java.lang.String VERSION_WARNING
```
    VERSION_WARNING must be a Boolean. This determines whether a warning should be output when running an XSLT 2.0 processor against an XSLT 1.0 stylesheet. The XSLT specification requires this to be done by default.
    
    See Also:
    
    Constant Field Values
  - XML_VERSION
```
public static final java.lang.String XML_VERSION
```
    XML_VERSION is a character string. This determines the XML version used by the Configuration: the value must be "1.0" or "1.1". For details, see Configuration.setXMLVersion(int).
    
    See Also:
    
    Constant Field Values

Class FeatureKeys

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ALLOW_EXTERNAL_FUNCTIONS

COLLATION_URI_RESOLVER

COLLECTION_URI_RESOLVER

COMPILE_WITH_TRACING

DTD_VALIDATION

LINE_NUMBERING

MESSAGE_EMITTER_CLASS

NAME_POOL

OUTPUT_URI_RESOLVER

RECOGNIZE_URI_QUERY_PARAMETERS

RECOVERY_POLICY

SCHEMA_VALIDATION

SOURCE_PARSER_CLASS

STRIP_WHITESPACE

STYLE_PARSER_CLASS

TIMING

TRACE_EXTERNAL_FUNCTIONS

TRACE_LISTENER

TREE_MODEL

VALIDATION_WARNINGS

VERSION_WARNING

XML_VERSION