Archetypes is a framework for developing new content types in Plone. The power of Archetypes is first in automatically generating forms, second in providing a library of stock field types, form widgets, and field validators, third in easily integrating custom fields, widgets, and validators, and fourth in automating transformations of rich content.
Silva is a CMS for organizations that manage multiple or complex Web sites. Content is stored in clean XML, independent of layout and presentation. Features include versioning, a workflow system, an integral visual editor, content reuse, sophisticated access control, multi-site management, extensive import/export facilities, fine-grained templating, and hi-res image storage and manipulation. Silva is built on top of the Zope Web application platform.
XPath Methods allows XPath queries on ParsedXML XML documents (and possibly other DOM implementations) in Zope. XPath is a relatively simple but still quite powerful query language used to address portions of XML documents. When you call an XPath Method you will retrieve a set of DOM nodes which you can then display in a Web page using DTML or ZPT, or which you can issue operations upon using, for instance, Python scripts.