[req.find] Use vreg.schema.eschema for eschema lookup
If an etype is non-existant, using vreg.schema[etype] raises a confusing error
complaining about a non-existing relation. This is because of the
implementation of vreg.schema.__getitem__ that look first in entities and then
in relations.
Using directly vreg.schema.eschema restrict the lookup to etypes only, hence
raises a meaningful error when the etype does not exist.
About this site
===============
This web application is based on the CubicWeb knowledge management system
from Logilab_. CubicWeb is made of an object database and a web
framework. It allows to develop an application by defining a set of
entities and their relationships, plus a set of views that present the
data selected from the object database using a specific query language.
This application has a precise schema_ and can be considered an
example of a semantic web database, as it can export the data to XML
and others formats and is not limited to publishing HTML.
Supported formats: |microformats|_ - JSON_ - |rss|_ - |dublincore|_
.. |microformats| image:: /data/microformats-button.png
.. _microformats: http://microformats.org
.. _JSON: http://www.json.org/
.. |rss| image:: /data/rss-button.png
.. _rss: http://www.rssboard.org
.. |dublincore| image:: /data/dublincore-button.png
.. _dublincore: http://dublincore.org
.. _Logilab: http://www.logilab.fr/
.. _schema: schema