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165 lines
5.0 KiB
HTML
165 lines
5.0 KiB
HTML
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<html><head>
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<!-- $Id: package.html,v 1.2.2.2 2002/01/12 21:42:21 dbrownell Exp $ -->
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</head><body>
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<p> This package provides the core SAX APIs.
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Some SAX1 APIs are deprecated to encourage integration of
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namespace-awareness into designs of new applications
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and into maintainance of existing infrastructure. </p>
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<p>See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
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for more information about SAX.</p>
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<h2> SAX2 Standard Feature Flags </h2>
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<p> One of the essential characteristics of SAX2 is that it added
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feature flags which can be used to examine and perhaps modify
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parser modes, in particular modes such as validation.
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Since features are identified by (absolute) URIs, anyone
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can define such features.
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Currently defined standard feature URIs have the prefix
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<code>http://xml.org/sax/features/</code> before an identifier such as
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<code>validation</code>. Turn features on or off using
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<em>setFeature</em>. Those standard identifiers are: </p>
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<table border="1" cellpadding="3" cellspacing="0" width="100%">
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<tr align="center" bgcolor="#ccccff">
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<th>Feature ID</th>
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<th>Default</th>
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<th>Description</th>
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</tr>
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<tr>
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<td>external-general-entities</td>
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<td><em>unspecified</em></td>
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<td> Reports whether this parser processes external
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general entities; always true if validating</td>
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</tr>
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<tr>
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<td>external-parameter-entities</td>
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<td><em>unspecified</em></td>
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<td> Reports whether this parser processes external
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parameter entities; always true if validating</td>
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</tr>
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<tr>
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<td>lexical-handler/parameter-entities</td>
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<td><em>unspecified</em></td>
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<td> true indicates that the LexicalHandler will report the
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beginning and end of parameter entities
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</td>
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</tr>
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<tr>
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<td>namespaces</td>
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<td>true</td>
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<td> true indicates namespace URIs and unprefixed local names
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for element and attribute names will be available </td>
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</tr>
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<tr>
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<td>namespace-prefixes</td>
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<td>false</td>
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<td> true indicates XML 1.0 names (with prefixes) and attributes
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(including <em>xmlns*</em> attributes) will be available </td>
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</tr>
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<tr>
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<td>string-interning</td>
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<td><em>unspecified</em></td>
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<td> true if all XML names (for elements, prefixes, attributes,
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entities, notations, and local names),
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as well as Namespace URIs, will have been interned
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using <em>java.lang.String.intern</em>. This supports fast
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testing of equality/inequality against string constants.</td>
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</tr>
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<tr>
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<td>validation</td>
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<td><em>unspecified</em></td>
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<td> controls whether the parser is reporting all validity
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errors; if true, all external entities will be read. </td>
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</tr>
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</table>
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<p> Support for the default values of the
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<em>namespaces</em> and <em>namespace-prefixes</em>
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properties is required.
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</p>
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<p> For default values not specified by SAX2,
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each XMLReader implementation specifies its default,
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or may choose not to expose the feature flag.
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Unless otherwise specified here,
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implementations may support changing current values
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of these standard feature flags, but not while parsing.
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</p>
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<h2> SAX2 Standard Handler and Property IDs </h2>
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<p> For parser interface characteristics that are described
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as objects, a separate namespace is defined. The
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objects in this namespace are again identified by URI, and
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the standard property URIs have the prefix
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<code>http://xml.org/sax/properties/</code> before an identifier such as
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<code>lexical-handler</code> or
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<code>dom-node</code>. Manage those properties using
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<em>setProperty()</em>. Those identifiers are: </p>
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<table border="1" cellpadding="3" cellspacing="0" width="100%">
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<tr align="center" bgcolor="#ccccff">
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<th>Property ID</th>
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<th>Description</th>
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</tr>
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<tr>
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<td>declaration-handler</td>
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<td> Used to see most DTD declarations except those treated
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as lexical ("document element name is ...") or which are
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mandatory for all SAX parsers (<em>DTDHandler</em>).
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The Object must implement <a href="ext/DeclHandler.html"
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><em>org.xml.sax.ext.DeclHandler</em></a>.
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</td>
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</tr>
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<tr>
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<td>dom-node</td>
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<td> For "DOM Walker" style parsers, which ignore their
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<em>parser.parse()</em> parameters, this is used to
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specify the DOM (sub)tree being walked by the parser.
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The Object must implement the
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<em>org.w3c.dom.Node</em> interface.
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</td>
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</tr>
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<tr>
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<td>lexical-handler</td>
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<td> Used to see some syntax events that are essential in some
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applications: comments, CDATA delimeters, selected general
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entity inclusions, and the start and end of the DTD
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(and declaration of document element name).
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The Object must implement <a href="ext/LexicalHandler.html"
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><em>org.xml.sax.ext.LexicalHandler</em></a>.
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</td>
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</tr>
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<tr>
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<td>xml-string</td>
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<td> Readable only during a parser callback, this exposes a <b>TBS</b>
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chunk of characters responsible for the current event. </td>
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</tr>
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</table>
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<p> All of these standard properties are optional;
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XMLReader implementations need not support them.
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</p>
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</body></html>
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