Silva 2.2 alpha Released

Infrae is pleased to announce the alpha release of Silva 2.2. This  
release adds a slew of new features for developers and system  
administrators, and is a quantum leap with Zope 2.11 and Five/Grok  
technology. Also the Sphinx-driven has gone online.

New features, of interest to developers

* Silva has been ‘eggified’. Buildout scripts can now retrieve eggs  
from and the Python Package Index (formerly  
the Cheese Shop).
* Five/Grok views are supported. This lets you define Zope 3 Views to  
render content.
* All Silva content types and services now use five.grok for  
configuration and registration.
* Content types are now created and edited using the z3c forms  
* Generic Formlib and z3c forms support have been added to the ZMI.
* The mechanism for previewing public pages has been refactored. No  
additional ZCML and view definitions are needed. Importantly, a Five  
namespace is used so that the author stays in preview mode even when  
* Publications can now become a subsite, meaning that they have local  
services that change their local configuration.
* A separate metadata set to mark publications as virtual hosts is not  
needed. Now to get virtual hosts working you just have to configure  
* Filesystem-based layout has been refactored: it’s now much easier to  
define a layout and extend it. You can use Zope 3 views, content  
providers and viewlets.
* Skin templates on the file system can be easily customized, via a  
customization service that duplicates the template in the ZODB.  
Customization can apply only to selected content with the help of  
customization markers, or to all content implementing one given  
interface (for instance all documents, or all containers). Manager  
users can then edit at will and make changes in a live server without  
restart. This is not a replacement for more robust development  
methods, but can be a great way to make small adjustments to parts of  
a site.

New features, of interest to system administrators

* BLOB support has been implemented. This provides the Zope 2.11  
option to use BLOBs for storing binary objects. The existing ExtFile  
implementation is still fully supported. Out-of-the-box, binaries are  
still stored in the ZODB.
* A user interface for conversion between ZODB binary storage, ExtFile  
binary storage and BLOB binary storage has been created. Migrate, or  
revert, with a button click.

New features, of interest to users

* Changes have been made in SilvaLayout with skin-based components  
added, such as viewlets, a viewlet manager, and content providers.
* When previewing, an author can now navigate throughout the site,  
staying in preview mode. This holds not only for content but for all  
links in a template.

Check out

Silva 2.2 code has been used to generate developer documentation using  
Sphinx. See This is also an alpha.

What is Silva?

Silva is a powerful CMS for organizations that manage multiple or  
complex websites. Content is stored in clean and futureproof XML,  
independent of layout and presentation. Features include versioning,  
workflow system, integral visual editor (Kupu), content reuse,  
sophisticated access control, multi-site management, extensive import/ 
export facilities, fine-grained templating, and hi-res image storage  
and manipulation.

For more complete information, see the Silva Product Pages at 


As this is a developer release it’s only available using buildout:
or using Paster by selecting the development distribution.


FMI contact Sylvain Viollon, sylvain at infrae com, +31 10 243 7051.

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