================
Features added
--------------
* Comments and processing instructions return '<!-- comment -->' and
'<?pi-target content?>' for repr()
* Parsers are now the preferred (and default) place where element class lookup
schemes should be registered. Namespace lookup is no longer supported by
default.
* Support for Python 2.5 beta
* Unlock the GIL for deep copying documents and for XPath()
* New ``compact`` keyword argument for parsing read-only documents
* Support for parser options in iterparse()
* The ``namespace`` axis is supported in XPath and returns (prefix, URI)
tuples
* The XPath expression "/" now returns an empty list instead of raising an
exception
* XML-Object API on top of lxml (lxml.objectify)
* Customizable Element class lookup:
* different pre-implemented lookup mechanisms
* support for externally provided lookup functions
* Support for processing instructions (ET-like, not compatible)
* Public C-level API for independent extension modules
* Module level ``iterwalk()`` function as 'iterparse' for trees
* Module level ``iterparse()`` function similar to ElementTree (see
documentation for differences)
* Element.nsmap property returns a mapping of all namespace prefixes known at
the Element to their namespace URI
* Reentrant threading support in RelaxNG, XMLSchema and XSLT
* Threading support in parsers and serializers:
* All in-memory operations (tostring, parse(StringIO), etc.) free the GIL
* File operations (on file names) free the GIL
* Reading from file-like objects frees the GIL and reacquires it for reading
* Serialisation to file-like objects is single-threaded (high lock overhead)
* Element iteration over XPath axes:
* Element.iterdescendants() iterates over the descendants of an element
* Element.iterancestors() iterates over the ancestors of an element (from
parent to parent)
* Element.itersiblings() iterates over either the following or preceding
siblings of an element
* Element.iterchildren() iterates over the children of an element in either
direction
* All iterators support the ``tag`` keyword argument to restrict the
generated elements
* Element.getnext() and Element.getprevious() return the direct siblings of an
element
Bugs fixed
----------
* filenames with local 8-bit encoding were not supported
* 1.1beta did not compile under Python 2.3
* ignore unknown 'pyval' attribute values in objectify
* objectify.ObjectifiedElement.addattr() failed to accept Elements and Lists
* objectify.ObjectPath.setattr() failed to accept Elements and Lists
* XPathSyntaxError now inherits from XPathError
* Threading race conditions in RelaxNG and XMLSchema
* Crash when mixing elements from XSLT results into other trees, concurrent
XSLT is only allowed when the stylesheet was parsed in the main thread
* The EXSLT ``regexp:match`` function now works as defined (except for some
differences in the regular expression syntax)
* Setting element.text to '' returned None on request, not the empty string
* ``iterparse()`` could crash on long XML files
* Creating documents no longer copies the parser for later URL resolving. For
performance reasons, only a reference is kept. Resolver updates on the
parser will now be reflected by documents that were parsed before the
change. Although this should rarely become visible, it is a behavioral
change from 1.0.