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What Is PyXB?
=============
PyXB is a pure `Python <http://www.python.org>`_ package that generates
Python code for classes that correspond to data structures defined by
`XMLSchema <http://www.w3.org/XML/Schema>`_. In concept it is similar to
`JAXB <http://en.wikipedia.org/wiki/JAXB>`_ for Java and `CodeSynthesis XSD
<http://www.codesynthesis.com/products/xsd/>`_ for C++.
The major goals of PyXB are:
* Provide a generated Python interface that is "Pythonic", meaning similar
to one that would have been hand-written:
+ Attributes and elements are Python fields (currently accessed through
inspector/mutator methods), with name conflicts resolved in favor of
elements
+ Elements with maxOccurs larger than 1 are stored as Python lists
+ Bindings for type extensions inherit from the binding for the base type
+ Enumeration constraints are exposed as class (constant) variables
* Support bi-directional conversion (DOM to Python and back)
* Allow easy customization of the generated bindings to provide
functionality along with content
* Support all XMLSchema features that are in common use, including:
+ complex content models (nested all/choice/sequence)
+ cross-namespace dependencies
+ include and import directives
+ constraints on simple types
Secondary goals, some of which have been achieved in the current release, are
listed in :ref:`pyxb_vision`.
Examples of Supported Schema
----------------------------
PyXB comes with pre-defined *bundles* which aggregate related namespaces
into pre-generated bindings that allow you to use them without having to
generate and manage them yourself. These bundles also demonstrate the
complexity of schema that PyXB is prepared to handle. Not all namespaces
have been fully tested, but they are expected to function correctly.
WS-*
^^^^
The following namespaces are available in support of web service
development:
.. PYXB_ARCHIVE_PATH=/home/pab/pyxb/dev/pyxb/bundles/wssplat// pyxbdump \
| grep wssplat \
| tr '\011' ' ' \
| sed -e 's@^\([^ ]*\) \([^ ]*\).*$@``\2`` ``\1``@g' \
| tr ' ' '\011' \
| expand -40 \
| sort \
> /tmp/x
===================================== ==========================================================
Binding Module Namespace
===================================== ==========================================================
``pyxb.bundles.wssplat.bpws`` ``http://schemas.xmlsoap.org/ws/2003/03/business-process/``
``pyxb.bundles.wssplat.ds`` ``http://www.w3.org/2000/09/xmldsig#``
``pyxb.bundles.wssplat.httpbind`` ``http://schemas.xmlsoap.org/wsdl/http/``
``pyxb.bundles.wssplat.mimebind`` ``http://schemas.xmlsoap.org/wsdl/mime/``
``pyxb.bundles.wssplat.soap11`` ``http://schemas.xmlsoap.org/soap/envelope/``
``pyxb.bundles.wssplat.soap12`` ``http://www.w3.org/2003/05/soap-envelope``
``pyxb.bundles.wssplat.soapbind11`` ``http://schemas.xmlsoap.org/wsdl/soap/``
``pyxb.bundles.wssplat.soapbind12`` ``http://schemas.xmlsoap.org/wsdl/soap12/``
``pyxb.bundles.wssplat.soapenc`` ``http://schemas.xmlsoap.org/soap/encoding/``
``pyxb.bundles.wssplat.whttp`` ``http://www.w3.org/ns/wsdl/http``
``pyxb.bundles.wssplat.wsa`` ``http://www.w3.org/2005/08/addressing``
``pyxb.bundles.wssplat.wsam`` ``http://www.w3.org/2007/02/addressing/metadata``
``pyxb.bundles.wssplat.wscoor`` ``http://docs.oasis-open.org/ws-tx/wscoor/2006/06``
``pyxb.bundles.wssplat.wsdl11`` ``http://schemas.xmlsoap.org/wsdl/``
``pyxb.bundles.wssplat.wsdl20`` ``http://www.w3.org/ns/wsdl``
``pyxb.bundles.wssplat.wsdli`` ``http://www.w3.org/ns/wsdl-instance``
``pyxb.bundles.wssplat.wsdlx`` ``http://www.w3.org/ns/wsdl-extensions``
``pyxb.bundles.wssplat.wsoap`` ``http://www.w3.org/ns/wsdl/soap``
``pyxb.bundles.wssplat.wsp200607`` ``http://www.w3.org/2006/07/ws-policy``
``pyxb.bundles.wssplat.wsp`` ``http://www.w3.org/ns/ws-policy``
``pyxb.bundles.wssplat.wsrm`` ``http://docs.oasis-open.org/ws-rx/wsrm/200702``
``pyxb.bundles.wssplat.wsse`` ``http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd``
``pyxb.bundles.wssplat.wsu`` ``http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd``
===================================== ==========================================================
OpenGIS
^^^^^^^
The following namespaces are available in support of `Open Geospatial
Consortium <http://www.opengeospatial.org/standards>`_ Geographic
Information System processing. Note that several of these namespaces are
"private" bindings generated because the OGC definitions include their own
schema. The modules corresponding to these namespace uses begin with an
underscore, and should generally not be used in other contexts.
.. PYXB_ARCHIVE_PATH=/home/pab/pyxb/dev/pyxb/bundles/opengis// pyxbdump \
| grep opengis \
| tr '\011' ' ' \
| sed -e 's@^\([^ ]*\) \([^ ]*\).*$@``\2`` ``\1``@g' \
| tr ' ' '\011' \
| expand -50 \
| sort \
> /tmp/x
================================================ ==========================================================
Binding Module Namespace
================================================ ==========================================================
``pyxb.bundles.opengis._atom`` ``http://www.w3.org/2005/Atom``
``pyxb.bundles.opengis._dc`` ``http://purl.org/dc/elements/1.1/``
``pyxb.bundles.opengis._dct`` ``http://purl.org/dc/terms/``
``pyxb.bundles.opengis._ogc`` ``http://www.opengis.net/ogc``
``pyxb.bundles.opengis._smil20`` ``http://www.w3.org/2001/SMIL20/``
``pyxb.bundles.opengis._smil20lang`` ``http://www.w3.org/2001/SMIL20/Language``
``pyxb.bundles.opengis.citygml.appearance`` ``http://www.opengis.net/citygml/appearance/1.0``
``pyxb.bundles.opengis.citygml.base`` ``http://www.opengis.net/citygml/1.0``
``pyxb.bundles.opengis.citygml.building`` ``http://www.opengis.net/citygml/building/1.0``
``pyxb.bundles.opengis.citygml.cityFurniture`` ``http://www.opengis.net/citygml/cityfurniture/1.0``
``pyxb.bundles.opengis.citygml.cityObjectGroup`` ``http://www.opengis.net/citygml/cityobjectgroup/1.0``
``pyxb.bundles.opengis.citygml.generics`` ``http://www.opengis.net/citygml/generics/1.0``
``pyxb.bundles.opengis.citygml.landUse`` ``http://www.opengis.net/citygml/landuse/1.0``
``pyxb.bundles.opengis.citygml.relief`` ``http://www.opengis.net/citygml/relief/1.0``
``pyxb.bundles.opengis.citygml.texturedSurface`` ``http://www.opengis.net/citygml/texturedsurface/1.0``
``pyxb.bundles.opengis.citygml.transportation`` ``http://www.opengis.net/citygml/transportation/1.0``
``pyxb.bundles.opengis.citygml.vegetation`` ``http://www.opengis.net/citygml/vegetation/1.0``
``pyxb.bundles.opengis.citygml.waterBody`` ``http://www.opengis.net/citygml/waterbody/1.0``
``pyxb.bundles.opengis.csw_2_0_2`` ``http://www.opengis.net/cat/csw/2.0.2``
``pyxb.bundles.opengis.filter`` ``http://www.opengis.net/ogc``
``pyxb.bundles.opengis.gml_3_2`` ``http://www.opengis.net/gml/3.2``
``pyxb.bundles.opengis.gml`` ``http://www.opengis.net/gml``
``pyxb.bundles.opengis.gmlsf`` ``http://www.opengis.net/gmlsf``
``pyxb.bundles.opengis.gmx`` ``http://www.isotc211.org/2005/gmx``
``pyxb.bundles.opengis.ic_ism_2_1`` ``urn:us:gov:ic:ism:v2``
``pyxb.bundles.opengis.iso19139.gco`` ``http://www.isotc211.org/2005/gco``
``pyxb.bundles.opengis.iso19139.gmd`` ``http://www.isotc211.org/2005/gmd``
``pyxb.bundles.opengis.iso19139.gsr`` ``http://www.isotc211.org/2005/gsr``
``pyxb.bundles.opengis.iso19139.gss`` ``http://www.isotc211.org/2005/gss``
``pyxb.bundles.opengis.iso19139.gts`` ``http://www.isotc211.org/2005/gts``
``pyxb.bundles.opengis.misc.xAL`` ``urn:oasis:names:tc:ciq:xsdschema:xAL:2.0``
``pyxb.bundles.opengis.misc.xlinks`` ``http://www.w3.org/1999/xlink``
``pyxb.bundles.opengis.ogckml22`` ``http://www.opengis.net/kml/2.2``
``pyxb.bundles.opengis.om_1_0`` ``http://www.opengis.net/om/1.0``
``pyxb.bundles.opengis.ows_1_1`` ``http://www.opengis.net/ows/1.1``
``pyxb.bundles.opengis.ows`` ``http://www.opengis.net/ows``
``pyxb.bundles.opengis.sampling_1_0`` ``http://www.opengis.net/sampling/1.0``
``pyxb.bundles.opengis.sensorML_1_0_1`` ``http://www.opengis.net/sensorML/1.0.1``
``pyxb.bundles.opengis.sos_1_0`` ``http://www.opengis.net/sos/1.0``
``pyxb.bundles.opengis.swe_1_0_0`` ``http://www.opengis.net/swe/1.0``
``pyxb.bundles.opengis.swe_1_0_1`` ``http://www.opengis.net/swe/1.0.1``
``pyxb.bundles.opengis.tml`` ``http://www.opengis.net/tml``
``pyxb.bundles.opengis.wcs_1_1`` ``http://www.opengis.net/wcs/1.1``
``pyxb.bundles.opengis.wfs`` ``http://www.opengis.net/wfs``
================================================ ==========================================================
Generating Bundled Bindings
^^^^^^^^^^^^^^^^^^^^^^^^^^^
Due to the size of the generated code, bundles are not incorporated into the
core distribution of PyXB. To create the support infrastructure for a
particular bundle, run the ``scripts/genbind`` script in the bundle root.
For example::
cd ${PYXB_ROOT}
pyxb/bundles/wssplat/scripts/genbind
will invoke the :manpage:`wget(1)` program to retrieve the XML schema for a
variety of namespaces related to web services, and generate bindings and
archive files for them.
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