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Dublin Core Elements

The Dublin Core metadata element set is a standard for cross-domain information resource description.
Element Description Value
Identifier resource ID http://old.zope.org/Members/pje/ZPatterns
Title resource name The ZPatterns Development Framework
Description resource summary A Database Independence and Framework Integration Pattern Language for Zope Copyright Copyright 2000, 2001 Phillip J. Eby and Tyler Sarna - All Rights Reserved. This software may be used, modified, and distributed, under the same terms as Zope itself. Upgrade Notice If you are upgrading from an earlier ZPatterns release, please read the 'CHANGES.txt' file for important information about updating. ZPatterns Introduction The ZPatterns product provides a variety of base classes and frameworks for Zope product and application development. Some currently available patterns include: PlugIns -- A framework for Folder-like objects ("plugin containers") to have management tabs ("plugin groups") that hold collections of objects ("plugins") supporting a particular collaboration interface ("plugin kind"). (Note: the PlugIns pattern implementation is now also available as a "seperate package":../PlugIns/, but is bundled with ZPatterns for your convenience. SheetProviders -- A framework for providing database-independent property sheets to objects. SheetProviders are PlugIns which Racks and Specialists use to give their contents PropertySheets, without any objects (besides the SheetProviders) needing to know how the property sheets are implemented or where they are stored. One can create SheetProviders that store data in literally any kind of database accessible by Zope. AttributeProviders (New in 0.3.0) -- Similar to SheetProviders, but for individual object attributes. Racks -- A framework for database-independent collections of objects. Racks retrieve or store objects. They are SheetProviderContainers and AttributeProviderContainers, and thus allow for property sheets and attributes to be added to their contents from another database. The default Rack implementation stores all data in the ZODB (as do the default "provider" implementations), but the framework code is documented for easy subclassing to create alternative storage methods. Specialists (New in 0.3.0) -- A way of organizing your applications around object interfaces and class-level services. (Known as 'Implementors' in the original RIPP Model) Currently, these patterns are used by the "LoginManager product":http://www.zope.org/Members/tsarna/LoginManager which uses Rack as a base for UserSources, PlugIn as a base for LoginMethods, and Specialist as a base for LoginManager itself. Thus, by creating Attribute or Sheet Provider objects, you can extend LoginManager's capabilities, as well as the capabilities of any other systems built on Racks and Specialists. Installation/Setup To support AttributeProviders and other useful features, ZPatterns 0.3.0 includes a C extension which must be built before the product can be used. After unpacking the ZPatterns product, you will need to build this extension using the included 'Setup' file in the ZPatterns directory. If you are not building ZPatterns in the lib/python/Products directory of your Zope installation, you will need to edit the 'Setup' file to reflect the correct paths to the include files it wants. Please follow the standard procedures for building a Python module on your platform. (On Unix-ish systems, this usually consists of copying a 'Makefile.pre.in' to the directory, then doing a 'make -f Makefile.pre.in boot' followed by 'make'. Once the extension is built, restart Zope to install the product. Then, if you are upgrading from a previous version of ZPatterns, follow the upgrade procedures in the 'CHANGES.txt' file to update classes and instances of objects based on the previous version of ZPatterns. Where to Find Other Documentation You can now use the Zope built-in help system to read LoginManager and ZPatterns documentation, or see the Products/ZPatterns/help directory. At present, only the TODO and CHANGES files exist. Please also see the "ZPatterns Wiki":http://www.zope.org/Members/pje/Wikis/ZPatterns/ Also, the ZPatterns are based on the RIPP pattern model presented by Phillip Eby at the Zope Track of IPC-8. There is a "PowerPoint presentation of that talk":http://www.zope.org/Members/pje/RIPP_Model.ppt available. (Also available in "HTML format":http://www.zope.org/Members/pje/RIPP_Talk_HTML )
Creator resource creator ZopeOrgSite
Date default date 2001-07-23 19:22:38
Format resource format text/html
Type resource type Software Package
Subject resource keywords Developer, External Access, Helpers
Contributors resource collaborators
Language resource language
Publisher resource publisher No publisher
Rights resource copyright


Additional Zope Elements
Element Description Value
CreationDate date resource created 2001-07-23 19:22:38
ModificationDate date resource last modified 2001-07-23 19:22:38
EffectiveDate date resource becomes effective None
ExpirationDate date resource expires None

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