| Questions |
| Bugzilla Extracting code from CVS Revalidation of DOM document in Memory Schema/DTD caching New Features? Validation International Encodings
| Answers |
| How do I use Bugzilla to report bugs? |
| Please report bugs against the newest release. If doubt exists whether the behaviour in question is a bug or a feature, please post a message to the xerces-j-user list for clarification. To help to eliminate duplicate bug reports, before reporting a bug, you should first query the bugzilla database to see whether the bug has already been reported (and perhaps fixed). Then, checkout code from CVS, and build Xerces-J locally to verify that a bug still exists. For more information visit the following links: http://nagoya.apache.org/bugzilla/ http://www.mozilla.org/bugs/
| How do I extract code from CVS? |
| set CVSROOT=:pserver:anoncvs@xml.apache.org:/home/cvspublic cvs login (password: anoncvs) cvs checkout -d xerces_j xml-xerces/java
| I have used the DOMParser to convert an XML document into a DOM tree. Then I made some changes to the DOM tree. How do I make sure the document still conforms to my (schema or DTD)? |
| DOM revalidation is not supported by Xerces 1. Ken Rawlings has been trying to build a revalidating DOMParser based on code which was dropped from Xerces because it was no longer being maintained. The current code is at: http://www.vervet.com/~krawling/RevalidatingDOMParser.java. We hope that Xerces 2 will include this capability.
| I have a (DTD or schema) that I will use to validate many XML documents. How can I avoid having to recompile it every time I want to validate a new document? |
| Xerces 1 does not currently support grammar caching. We expect that Xerces 2 will support this functionality. Some users have reported success by registering an EntityResolver which handles reading the grammar from the disk and storing it in an efficient way (usually a byteArray), then passing the parser a reader for the efficiently-stored structure. While this does not avoid recompiling the grammar for each instance document, it does avoid disk accesses.
| What are the new features? |
| Here are some of the new features in Xerces-J: Additional support for W3C XML Schema Language. DOS filenames no longer work. See Common Problems section of the FAQ.
| How do I turn on validation? |
| You can turn validation on and off via methods available on the SAX2 `XMLFilter` interface. While only the `SAXParser` implements the `XMLFilter` interface, the methods required for turning on validation are available to both parser classes, DOM and SAX. The code snippet below shows how to turn validation on -- assume that parser is an instance of either `org.apache.xerces.parsers.SAXParser` or `org.apache.xerces.parsers.DOMParser`. `parser.setFeature("http://xml.org/sax/features/validation", true);` IMPORTANT!Simply turning on validation will not make Xerces actually report the errors that it detects. For this, you need to implement the `org.xml.sax.ErrorHandler` interface and register your implementation with the parser using the `setErrorHandler` method.
| What international encodings are supported by Xerces-J? |
| UTF-8 UTF-16 Big Endian, UTF-16 Little Endian IBM-1208 ISO Latin-1 (ISO-8859-1) ISO Latin-2 (ISO-8859-2) [Bosnian, Croatian, Czech, Hungarian, Polish, Romanian, Serbian (in Latin transcription), Serbocroatian, Slovak, Slovenian, Upper and Lower Sorbian] ISO Latin-3 (ISO-8859-3) [Maltese, Esperanto] ISO Latin-4 (ISO-8859-4) ISO Latin Cyrillic (ISO-8859-5) ISO Latin Arabic (ISO-8859-6) ISO Latin Greek (ISO-8859-7) ISO Latin Hebrew (ISO-8859-8) ISO Latin-5 (ISO-8859-9) [Turkish] Extended Unix Code, packed for Japanese (euc-jp, eucjis) Japanese Shift JIS (shift-jis) Chinese (big5) Chinese for PRC (mixed 1/2 byte) (gb2312) Japanese ISO-2022-JP (iso-2022-jp) Cyrllic (koi8-r) Extended Unix Code, packed for Korean (euc-kr) Russian Unix, Cyrillic (koi8-r) Windows Thai (cp874) Latin 1 Windows (cp1252) cp858 EBCDIC encodings: EBCDIC US (ebcdic-cp-us) EBCDIC Canada (ebcdic-cp-ca) EBCDIC Netherland (ebcdic-cp-nl) EBCDIC Denmark (ebcdic-cp-dk) EBCDIC Norway (ebcdic-cp-no) EBCDIC Finland (ebcdic-cp-fi) EBCDIC Sweden (ebcdic-cp-se) EBCDIC Italy (ebcdic-cp-it) EBCDIC Spain, Latin America (ebcdic-cp-es) EBCDIC Great Britain (ebcdic-cp-gb) EBCDIC France (ebcdic-cp-fr) EBCDIC Hebrew (ebcdic-cp-he) EBCDIC Switzerland (ebcdic-cp-ch) EBCDIC Roece (ebcdic-cp-roece) EBCDIC Yugoslavia (ebcdic-cp-yu) EBCDIC Iceland (ebcdic-cp-is) EBCDIC Urdu (ebcdic-cp-ar2) Latin 0 EBCDIC EBCDIC Arabic (ebcdic-cp-ar1)

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