ANN: Ophelia 0.2 - Create web sites from TAL templates
thomas at thomas-lotze.de
Sun Feb 4 23:31:02 CET 2007
Ophelia 0.2 was released today.
Ophelia creates XHTML pages from templates written in TAL, the Zope Tag
Attribute Language. It is designed to reduce code repetition to zero.
At present, Ophelia contains a request handler for the Apache2 web server.
Ophelia is released under the Zope Public License, version 2.1.
To use Ophelia 0.2, you need:
- Python 2.4 or better
- mod_python 3.1 or better
- the zope.tal package from Zope3 and anything it depends upon
WSGI support is planned for a future version, possibly 0.3.
The package is available from the Python package index as a source
distribution and as eggs for both Python 2.4 and 2.5:
You can access the source code repository at
browse it using ViewCVS at
or visit Ophelia's web page, containing a commented live usage example, at
>From the documentation:
What kind of sites is Ophelia good for?
Consider Ophelia as SSI on drugs. It's not fundamentally different, just a
lot friendlier and more capable.
Use Ophelia for sites where you basically write your HTML yourself, except
that you need write the recurring stuff only once. Reducing repetition to zero
comes at a price: your site must follow a pattern for Ophelia to combine your
templates the right way.
Consider your site's layout to be hierarchical: there's a common look to all
your pages, sections have certain characteristics, and each page has unique
content. It's crucial to Ophelia that this hierarchy reflect in the file
system organization of your documents; how templates combine is deduced from
their places in the hierarchy of directories.
Ophelia makes the Python language available for including dynamic content.
Each template file may include a Python script. Python scripts and templates
contributing to a page share a common set of variables to modify and use.
Ophelia's content model is very simple and works best if each content object
you publish is its own view: the page it is represented on. If you get content
from external resources anyway (e.g. a database or a version control
repository), it's still OK to use Ophelia even with multiple views per content
object as long as an object's views don't depend on the object's type or even
the object itself.
Trying to use Ophelia on a more complex site will lead to an ugly entanglement
of logic and presentation. Don't use Ophelia for sites that are actually web
interfaces to applications, content management systems and the like.
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