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CHANGES.txt
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==============
lxml changelog
==============
Latest changes
==================
* New ``htmlfile`` HTML generator to accompany the incremental ``xmlfile``
serialisation API. Patch by Burak Arslan.
3.4.0 (2014-09-10)
==================
Features added
--------------
* ``xmlfile(buffered=False)`` disables output buffering and flushes the
content after each API operation (starting/ending element blocks or writes).
A new method ``xf.flush()`` can alternatively be used to explicitly flush
the output.
* ``lxml.html.document_fromstring`` has a new option ``ensure_head_body=True``
which will add an empty head and/or body element to the result document if
missing.
* ``lxml.html.iterlinks`` now returns links inside meta refresh tags.
* New ``XMLParser`` option ``collect_ids=False`` to disable ID hash table
creation. This can substantially speed up parsing of documents with many
different IDs that are not used.
* The parser uses per-document hash tables for XML IDs. This reduces the
load of the global parser dict and speeds up parsing for documents with
many different IDs.
* ``ElementTree.getelementpath(element)`` returns a structural ElementPath
expression for the given element, which can be used for lookups later.
* ``xmlfile()`` accepts a new argument ``close=True`` to close file(-like)
objects after writing to them. Before, ``xmlfile()`` only closed the file
if it had opened it internally.
* Allow "bytearray" type for ASCII text input.
Bugs fixed
----------
Other changes
-------------
* LP#400588: decoding errors have become hard errors even in recovery mode.
Previously, they could lead to an internal tree representation in a mixed
encoding state, which lead to very late errors or even silently incorrect
behaviour during tree traversal or serialisation.
* Requires Python 2.6, 2.7, 3.2 or later. No longer supports
Python 2.4, 2.5 and 3.1, use lxml 3.3.x for those.
* Requires libxml2 2.7.0 or later and libxslt 1.1.23 or later,
use lxml 3.3.x with older versions.
3.3.6 (2014-08-28)
==================
Bugs fixed
----------
* Prevent tree cycle creation when adding Elements as siblings.
* LP#1361948: crash when deallocating Element siblings without parent.
* LP#1354652: crash when traversing internally loaded documents in XSLT
extension functions.
3.3.5 (2014-04-18)
==================
Bugs fixed
----------
* HTML cleaning could fail to strip javascript links that mix control
characters into the link scheme.
3.3.4 (2014-04-03)
==================
Features added
--------------
* Source line numbers above 65535 are available on Elements when
using libxml2 2.9 or later.
Bugs fixed
----------
* ``lxml.html.fragment_fromstring()`` failed for bytes input in Py3.
Other changes
-------------
3.3.3 (2014-03-04)
==================
Bugs fixed
----------
* LP#1287118: Crash when using Element subtypes with ``__slots__``.
Other changes
-------------
* The internal classes ``_LogEntry`` and ``_Attrib`` can no longer be
subclassed from Python code.
3.3.2 (2014-02-26)
==================
Bugs fixed
----------
* The properties ``resolvers`` and ``version``, as well as the methods
``set_element_class_lookup()`` and ``makeelement()``, were lost from
``iterparse`` objects in 3.3.0.
* LP#1222132: instances of ``XMLSchema``, ``Schematron`` and ``RelaxNG``
did not clear their local ``error_log`` before running a validation.
* LP#1238500: lxml.doctestcompare mixed up "expected" and "actual" in
attribute values.
* Some file I/O tests were failing in MS-Windows due to non-portable temp
file usage. Initial patch by Gabi Davar.
* LP#910014: duplicate IDs in a document were not reported by DTD validation.
* LP#1185332: ``tostring(method="html")`` did not use HTML serialisation
semantics for trailing tail text. Initial patch by Sylvain Viollon.
* LP#1281139: ``.attrib`` value of Comments lost its mutation methods
in 3.3.0. Even though it is empty and immutable, it should still
provide the same interface as that returned for Elements.
3.3.1 (2014-02-12)
==================
Features added
--------------
Bugs fixed
----------
* LP#1014290: HTML documents parsed with ``parser.feed()`` failed to find
elements during tag iteration.
* LP#1273709: Building in PyPy failed due to missing support for
``PyUnicode_Compare()`` and ``PyByteArray_*()`` in PyPy's C-API.
* LP#1274413: Compilation in MSVC failed due to missing "stdint.h" standard
header file.
* LP#1274118: iterparse() failed to parse BOM prefixed files.
Other changes
-------------
3.3.0 (2014-01-26)
==================
Features added
--------------
Bugs fixed
----------
* The heuristic that distinguishes file paths from URLs was tightened
to produce less false negatives.
Other changes
-------------
3.3.0beta5 (2014-01-18)
=======================
Features added
--------------
* The PEP 393 unicode parsing support gained a fallback for wchar strings
which might still be somewhat common on Windows systems.
Bugs fixed
----------
* Several error handling problems were fixed throughout the code base that
could previously lead to exceptions being silently swallowed or not
properly reported.
* The C-API function ``appendChild()`` is now deprecated as it does not
propagate exceptions (its return type is ``void``). The new function
``appendChildToElement()`` was added as a safe replacement.
* Passing a string into ``fromstringlist()`` raises an exception instead of
parsing the string character by character.
Other changes
-------------
* Document cleanup code was simplified using the new GC features in
Cython 0.20.
3.3.0beta4 (2014-01-12)
=======================
Features added
--------------
Bugs fixed
----------
* The (empty) value returned by the ``attrib`` property of Entity and Comment
objects was mutable.
* Element class lookup wasn't available for the new pull parsers or when using
a custom parser target.
* Setting Element attributes on instantiation with both the ``attrib`` argument
and keyword arguments could modify the mapping passed as ``attrib``.
* LP#1266171: DTDs instantiated from internal/external subsets (i.e. through
the docinfo property) lost their attribute declarations.
Other changes
-------------
* Built with Cython 0.20pre (gitrev 012ae82eb) to prepare support for
Python 3.4.
3.3.0beta3 (2014-01-02)
=======================
Features added
--------------
* Unicode string parsing was optimised for Python 3.3 (PEP 393).
Bugs fixed
----------
* HTML parsing of Unicode strings could misdecode the input on some platforms.
* Crash in xmlfile() when closing open elements out of order in an error case.
Other changes
-------------
3.3.0beta2 (2013-12-20)
=======================
Features added
--------------
* ``iterparse()`` supports the ``recover`` option.
Bugs fixed
----------
* Crash in ``iterparse()`` for HTML parsing.
* Crash in target parsing with attributes.
Other changes
-------------
* The safety check in the read-only tree implementation (e.g. used by
``PythonElementClassLookup``) raises a more appropriate ``ReferenceError``
for illegal access after tree disposal instead of an ``AssertionError``.
This should only impact test code that specifically checks the original
behaviour.
3.3.0beta1 (2013-12-12)
=======================
Features added
--------------
* New option ``handle_failures`` in ``make_links_absolute()`` and
``resolve_base_href()`` (lxml.html) that enables ignoring or
discarding links that fail to parse as URLs.
* New parser classes ``XMLPullParser`` and ``HTMLPullParser`` for
incremental parsing, as implemented for ElementTree in Python 3.4.
* ``iterparse()`` enables recovery mode by default for HTML parsing
(``html=True``).
Bugs fixed
----------
* LP#1255132: crash when trying to run validation over non-Element (e.g.
comment or PI).
* Error messages in the log and in exception messages that originated
from libxml2 could accidentally be picked up from preceding warnings
instead of the actual error.
* The ``ElementMaker`` in lxml.objectify did not accept a dict as
argument for adding attributes to the element it's building. This
works as in lxml.builder now.
* LP#1228881: ``repr(XSLTAccessControl)`` failed in Python 3.
* Raise ``ValueError`` when trying to append an Element to itself or
to one of its own descendants, instead of running into an infinite
loop.
* LP#1206077: htmldiff discarded whitespace from the output.
* Compressed plain-text serialisation to file-like objects was broken.
* lxml.html.formfill: Fix textarea form filling.
The textarea used to be cleared before the new content was set,
which removed the name attribute.
Other changes
-------------
* Some basic API classes use freelists internally for faster
instantiation. This can speed up some ``iterparse()`` scenarios,
for example.
* ``iterparse()`` was rewritten to use the new ``*PullParser``
classes internally instead of being a parser itself.
3.2.5 (2014-01-02)
==================
Features added
--------------
Bugs fixed
----------
* Crash in xmlfile() when closing open elements out of order in an error case.
* Crash in target parsing with attributes.
* LP#1255132: crash when trying to run validation over non-Element (e.g.
comment or PI).
Other changes
-------------
3.2.4 (2013-11-07)
==================
Features added
--------------
Bugs fixed
----------
* Memory leak when creating an XPath evaluator in a thread.
* LP#1228881: ``repr(XSLTAccessControl)`` failed in Python 3.
* Raise ``ValueError`` when trying to append an Element to itself or
to one of its own descendants.
* LP#1206077: htmldiff discarded whitespace from the output.
* Compressed plain-text serialisation to file-like objects was broken.
Other changes
-------------
3.2.3 (2013-07-28)
==================
Bugs fixed
----------
* Fix support for Python 2.4 which was lost in 3.2.2.
3.2.2 (2013-07-28)
==================
Features added
--------------
Bugs fixed
----------
* LP#1185701: spurious XMLSyntaxError after finishing iterparse().
* Crash in lxml.objectify during xsi annotation.
Other changes
-------------
* Return values of user provided element class lookup methods are now
validated against the type of the XML node they represent to prevent
API class mismatches.
3.2.1 (2013-05-11)
==================
Features added
--------------
* The methods ``apply_templates()`` and ``process_children()`` of XSLT
extension elements have gained two new boolean options ``elements_only``
and ``remove_blank_text`` that discard either all strings or whitespace-only
strings from the result list.
Bugs fixed
----------
* When moving Elements to another tree, the namespace cleanup mechanism
no longer drops namespace prefixes from attributes for which it finds
a default namespace declaration, to prevent them from appearing as
unnamespaced attributes after serialisation.
* Returning non-type objects from a custom class lookup method could lead
to a crash.
* Instantiating and using subtypes of Comments and ProcessingInstructions
crashed.
Other changes
-------------
3.2.0 (2013-04-28)
==================
Features added
--------------
Bugs fixed
----------
* LP#690319: Leading whitespace could change the behaviour of the string
parsing functions in ``lxml.html``.
* LP#599318: The string parsing functions in ``lxml.html`` are more robust
in the face of uncommon HTML content like framesets or missing body tags.
Patch by Stefan Seelmann.
* LP#712941: I/O errors while trying to access files with paths that contain
non-ASCII characters could raise ``UnicodeDecodeError`` instead of properly
reporting the ``IOError``.
* LP#673205: Parsing from in-memory strings disabled network access in the
default parser and made subsequent attempts to parse from a URL fail.
* LP#971754: lxml.html.clean appends 'nofollow' to 'rel' attributes instead
of overwriting the current value.
* LP#715687: lxml.html.clean no longer discards scripts that are explicitly
allowed by the user provided whitelist. Patch by Christine Koppelt.
Other changes
-------------
3.1.2 (2013-04-12)
==================
Features added
--------------
Bugs fixed
----------
* LP#1136509: Passing attributes through the namespace-unaware API of
the sax bridge (i.e. the ``handler.startElement()`` method) failed
with a ``TypeError``. Patch by Mike Bayer.
* LP#1123074: Fix serialisation error in XSLT output when converting
the result tree to a Unicode string.
* GH#105: Replace illegal usage of ``xmlBufLength()`` in libxml2 2.9.0
by properly exported API function ``xmlBufUse()``.
Other changes
-------------
3.1.1 (2013-03-29)
==================
Features added
--------------
Bugs fixed
----------
* LP#1160386: Write access to ``lxml.html.FormElement.fields`` raised
an AttributeError in Py3.
* Illegal memory access during cleanup in incremental xmlfile writer.
Other changes
-------------
* The externally useless class ``lxml.etree._BaseParser`` was removed
from the module dict.
3.1.0 (2013-02-10)
==================
Features added
--------------
* GH#89: lxml.html.clean allows overriding the set of attributes that it
considers 'safe'. Patch by Francis Devereux.
Bugs fixed
----------
* LP#1104370: ``copy.copy(el.attrib)`` raised an exception. It now returns
a copy of the attributes as a plain Python dict.
* GH#95: When used with namespace prefixes, the ``el.find*()`` methods
always used the first namespace mapping that was provided for each
path expression instead of using the one that was actually passed
in for the current run.
* LP#1092521, GH#91: Fix undefined C symbol in Python runtimes compiled
without threading support. Patch by Ulrich Seidl.
Other changes
-------------
3.1beta1 (2012-12-21)
=====================
Features added
--------------
* New build-time option ``--with-unicode-strings`` for Python 2 that
makes the API always return Unicode strings for names and text
instead of byte strings for plain ASCII content.
* New incremental XML file writing API ``etree.xmlfile()``.
* E factory in lxml.objectify is callable to simplify the creation of
tags with non-identifier names without having to resort to getattr().
Bugs fixed
----------
* When starting from a non-namespaced element in lxml.objectify, searching
for a child without explicitly specifying a namespace incorrectly found
namespaced elements with the requested local name, instead of restricting
the search to non-namespaced children.
* GH#85: Deprecation warnings were fixed for Python 3.x.
* GH#33: lxml.html.fromstring() failed to accept bytes input in Py3.
* LP#1080792: Static build of libxml2 2.9.0 failed due to missing file.
Other changes
-------------
* The externally useless class ``_ObjectifyElementMakerCaller`` was
removed from the module API of lxml.objectify.
* LP#1075622: lxml.builder is faster for adding text to elements with
many children. Patch by Anders Hammarquist.
3.0.2 (2012-12-14)
==================
Features added
--------------
Bugs fixed
----------
* Fix crash during interpreter shutdown by switching to Cython 0.17.3 for building.
Other changes
-------------
3.0.1 (2012-10-14)
==================
Features added
--------------
Bugs fixed
----------
* LP#1065924: Element proxies could disappear during garbage collection
in PyPy without proper cleanup.
* GH#71: Failure to work with libxml2 2.6.x.
* LP#1065139: static MacOS-X build failed in Py3.
Other changes
-------------
3.0 (2012-10-08)
================
Features added
--------------
Bugs fixed
----------
* End-of-file handling was incorrect in iterparse() when reading from
a low-level C file stream and failed in libxml2 2.9.0 due to its
improved consistency checks.
Other changes
-------------
* The build no longer uses Cython by default unless the generated C files
are missing. To use Cython, pass the option "--with-cython". To ignore
the fatal build error when Cython is required but not available (e.g. to
run special setup.py commands that do not actually run a build), pass
"--without-cython".
3.0beta1 (2012-09-26)
=====================
Features added
--------------
* Python level access to (optional) libxml2 memory debugging features
to simplify debugging of memory leaks etc.
Bugs fixed
----------
* Fix a memory leak in XPath by switching to Cython 0.17.1.
* Some tests were adapted to work with PyPy.
Other changes
-------------
* The code was adapted to work with the upcoming libxml2 2.9.0 release.
3.0alpha2 (2012-08-23)
======================
Features added
--------------
* The ``.iter()`` method of elements now accepts ``tag`` arguments like
``"{*}name"`` to search for elements with a given local name in any
namespace. With this addition, all combinations of wildcards now work
as expected:
``"{ns}name"``, ``"{}name"``, ``"{*}name"``, ``"{ns}*"``, ``"{}*"``
and ``"{*}*"``. Note that ``"name"`` is equivalent to ``"{}name"``,
but ``"*"`` is ``"{*}*"``.
The same change applies to the ``.getiterator()``, ``.itersiblings()``,
``.iterancestors()``, ``.iterdescendants()``, ``.iterchildren()``
and ``.itertext()`` methods;the ``strip_attributes()``,
``strip_elements()`` and ``strip_tags()`` functions as well as the
``iterparse()`` class. Patch by Simon Sapin.
* C14N allows specifying the inclusive prefixes to be promoted
to top-level during exclusive serialisation.
Bugs fixed
----------
* Passing long Unicode strings into the ``feed()`` parser interface
failed to read the entire string.
Other changes
-------------
3.0alpha1 (2012-07-31)
======================
Features added
--------------
* Initial support for building in PyPy (through cpyext).
* DTD objects gained an API that allows read access to their
declarations.
* ``xpathgrep.py`` gained support for parsing line-by-line (e.g.
from grep output) and for surrounding the output with a new root
tag.
* ``E-factory`` in ``lxml.builder`` accepts subtypes of known data
types (such as string subtypes) when building elements around them.
* Tree iteration and ``iterparse()`` with a selective ``tag``
argument supports passing a set of tags. Tree nodes will be
returned by the iterators if they match any of the tags.
Bugs fixed
----------
* The ``.find*()`` methods in ``lxml.objectify`` no longer use XPath
internally, which makes them faster in many cases (especially when
short circuiting after a single or couple of elements) and fixes
some behavioural differences compared to ``lxml.etree``. Note that
this means that they no longer support arbitrary XPath expressions
but only the subset that the ``ElementPath`` language supports.
The previous implementation was also redundant with the normal
XPath support, which can be used as a replacement.
* ``el.find('*')`` could accidentally return a comment or processing
instruction that happened to be in the wrong spot. (Same for the
other ``.find*()`` methods.)
* The error logging is less intrusive and avoids a global setup where
possible.
* Fixed undefined names in html5lib parser.
* ``xpathgrep.py`` did not work in Python 3.
* ``Element.attrib.update()`` did not accept an ``attrib`` of
another Element as parameter.
* For subtypes of ``ElementBase`` that make the ``.text`` or ``.tail``
properties immutable (as in objectify, for example), inserting text
when creating Elements through the E-Factory feature of the class
constructor would fail with an exception, stating that the text
cannot be modified.
Other changes
--------------
* The code base was overhauled to properly use 'const' where the API
of libxml2 and libxslt requests it. This also has an impact on the
public C-API of lxml itself, as defined in ``etreepublic.pxd``, as
well as the provided declarations in the ``lxml/includes/`` directory.
Code that uses these declarations may have to be adapted. On the
plus side, this fixes several C compiler warnings, also for user
code, thus making it easier to spot real problems again.
* The functionality of "lxml.cssselect" was moved into a separate PyPI
package called "cssselect". To continue using it, you must install
that package separately. The "lxml.cssselect" module is still
available and provides the same interface, provided the "cssselect"
package can be imported at runtime.
* Element attributes passed in as an ``attrib`` dict or as keyword
arguments are now sorted by (namespaced) name before being created
to make their order predictable for serialisation and iteration.
Note that adding or deleting attributes afterwards does not take
that order into account, i.e. setting a new attribute appends it
after the existing ones.
* Several classes that are for internal use only were removed
from the ``lxml.etree`` module dict:
``_InputDocument, _ResolverRegistry, _ResolverContext, _BaseContext,
_ExsltRegExp, _IterparseContext, _TempStore, _ExceptionContext,
__ContentOnlyElement, _AttribIterator, _NamespaceRegistry,
_ClassNamespaceRegistry, _FunctionNamespaceRegistry,
_XPathFunctionNamespaceRegistry, _ParserDictionaryContext,
_FileReaderContext, _ParserContext, _PythonSaxParserTarget,
_TargetParserContext, _ReadOnlyProxy, _ReadOnlyPIProxy,
_ReadOnlyEntityProxy, _ReadOnlyElementProxy, _OpaqueNodeWrapper,
_OpaqueDocumentWrapper, _ModifyContentOnlyProxy,
_ModifyContentOnlyPIProxy, _ModifyContentOnlyEntityProxy,
_AppendOnlyElementProxy, _SaxParserContext, _FilelikeWriter,
_ParserSchemaValidationContext, _XPathContext,
_XSLTResolverContext, _XSLTContext, _XSLTQuotedStringParam``
* Several internal classes can no longer be inherited from:
``_InputDocument, _ResolverRegistry, _ExsltRegExp, _ElementUnicodeResult,
_IterparseContext, _TempStore, _AttribIterator, _ClassNamespaceRegistry,
_XPathFunctionNamespaceRegistry, _ParserDictionaryContext,
_FileReaderContext, _PythonSaxParserTarget, _TargetParserContext,
_ReadOnlyPIProxy, _ReadOnlyEntityProxy, _OpaqueDocumentWrapper,
_ModifyContentOnlyPIProxy, _ModifyContentOnlyEntityProxy,
_AppendOnlyElementProxy, _FilelikeWriter, _ParserSchemaValidationContext,
_XPathContext, _XSLTResolverContext, _XSLTContext, _XSLTQuotedStringParam,
_XSLTResultTree, _XSLTProcessingInstruction``
2.3.6 (2012-09-28)
==================
Features added
--------------
Bugs fixed
----------
* Passing long Unicode strings into the ``feed()`` parser interface
failed to read the entire string.
Other changes
--------------
2.3.5 (2012-07-31)
==================
Features added
--------------
Bugs fixed
----------
* Crash when merging text nodes in ``element.remove()``.
* Crash in sax/target parser when reporting empty doctype.
Other changes
--------------
2.3.4 (2012-03-26)
==================
Features added
--------------
Bugs fixed
----------
* Crash when building an nsmap (Element property) with empty
namespace URIs.
* Crash due to race condition when errors (or user messages) occur
during threaded XSLT processing.
* XSLT stylesheet compilation could ignore compilation errors.
Other changes
--------------
2.3.3 (2012-01-04)
==================
Features added
--------------
* ``lxml.html.tostring()`` gained new serialisation options
``with_tail`` and ``doctype``.
Bugs fixed
----------
* Fixed a crash when using ``iterparse()`` for HTML parsing and
requesting start events.
* Fixed parsing of more selectors in cssselect. Whitespace before
pseudo-elements and pseudo-classes is significant as it is a
descendant combinator.
"E :pseudo" should parse the same as "E \*:pseudo", not "E:pseudo".
Patch by Simon Sapin.
* lxml.html.diff no longer raises an exception when hitting
'img' tags without 'src' attribute.
Other changes
--------------
2.3.2 (2011-11-11)
==================
Features added
--------------
* ``lxml.objectify.deannotate()`` has a new boolean option
``cleanup_namespaces`` to remove the objectify namespace
declarations (and generally clean up the namespace declarations)
after removing the type annotations.
* ``lxml.objectify`` gained its own ``SubElement()`` function as a
copy of ``etree.SubElement`` to avoid an otherwise redundant import
of ``lxml.etree`` on the user side.
Bugs fixed
----------
* Fixed the "descendant" bug in cssselect a second time (after a first
fix in lxml 2.3.1). The previous change resulted in a serious
performance regression for the XPath based evaluation of the
translated expression. Note that this breaks the usage of some of
the generated XPath expressions as XSLT location paths that
previously worked in 2.3.1.
* Fixed parsing of some selectors in cssselect. Whitespace after combinators
">", "+" and "~" is now correctly ignored. Previously is was parsed as
a descendant combinator. For example, "div> .foo" was parsed the same as
"div>* .foo" instead of "div>.foo". Patch by Simon Sapin.
Other changes
--------------
2.3.1 (2011-09-25)
==================
Features added
--------------
* New option ``kill_tags`` in ``lxml.html.clean`` to remove specific
tags and their content (i.e. their whole subtree).
* ``pi.get()`` and ``pi.attrib`` on processing instructions to parse
pseudo-attributes from the text content of processing instructions.
* ``lxml.get_include()`` returns a list of include paths that can be
used to compile external C code against lxml.etree. This is
specifically required for statically linked lxml builds when code
needs to compile against the exact same header file versions as lxml
itself.
* ``Resolver.resolve_file()`` takes an additional option
``close_file`` that configures if the file(-like) object will be
closed after reading or not. By default, the file will be closed,
as the user is not expected to keep a reference to it.
Bugs fixed
----------
* HTML cleaning didn't remove 'data:' links.
* The html5lib parser integration now uses the 'official'
implementation in html5lib itself, which makes it work with newer
releases of the library.
* In ``lxml.sax``, ``endElementNS()`` could incorrectly reject a plain
tag name when the corresponding start event inferred the same plain
tag name to be in the default namespace.
* When an open file-like object is passed into ``parse()`` or
``iterparse()``, the parser will no longer close it after use. This
reverts a change in lxml 2.3 where all files would be closed. It is
the users responsibility to properly close the file(-like) object,
also in error cases.
* Assertion error in lxml.html.cleaner when discarding top-level elements.
* In lxml.cssselect, use the xpath 'A//B' (short for
'A/descendant-or-self::node()/B') instead of 'A/descendant::B' for
the css descendant selector ('A B'). This makes a few edge cases
like ``"div *:last-child"`` consistent with the selector behavior in
WebKit and Firefox, and makes more css expressions valid location
paths (for use in xsl:template match).
* In lxml.html, non-selected ``<option>`` tags no longer show up in the
collected form values.
* Adding/removing ``<option>`` values to/from a multiple select form
field properly selects them and unselects them.
Other changes
--------------
* Static builds can specify the download directory with the
``--download-dir`` option.
2.3 (2011-02-06)
================
Features added
--------------
* When looking for children, ``lxml.objectify`` takes '{}tag' as
meaning an empty namespace, as opposed to the parent namespace.