Metadata-Version: 1.0
Name: zif.sedna
Version: 0.10alpha2
Summary: Sedna XML Database adapter
Home-page: http://zif.svn.sourceforge.net/viewvc/zif/zif.sedna
Author: Jim Washington
Author-email: jwashin@vt.edu
License: BSD
Description: *********
        zif.sedna
        *********
        
        Sedna, available at http://modis.ispras.ru/sedna/, under Apache 2.0 license, is
        a transactional native XML database operating over TCP/IP.  Sedna is open
        source and has excellent documentation. The mailing list, [Sedna-discussion],
        is responsive for questions. Sedna currently runs on Windows 2000/XP and
        Linux x86, available in source and binary formats.
        
        Analogous to an SQL database, a Sedna database is a set of related XML
        documents and collections of XML documents. Documents hold data in an XML
        structure, not restricted to any particular (e.g., tabular) format.  Collections
        are used to organize documents with similar schemas so that those documents may
        be queried together or separately.
        
        A Sedna server may handle multiple databases.  A database may contain multiple
        XML documents and multiple collections of multiple XML documents.  Data size is
        unrestricted.
        
        Analogous to an SQL database, data access is through a query language.  Sedna's
        query language is XQuery, http://www.w3.org/TR/xquery/.  XQuery is more
        like python or C or perl than like XML.  Particularly, XPath expressions are
        like list generators, obtaining data elements by their type, value, and/or
        path, and FLOWR expressions are like list comprehensions.  There are several
        XQuery tutorials on the web.  Like SQL, XQuery may get complicated, but the
        easy stuff is often powerful enough for your needs.
        
        Sedna has extensions to XQuery for inserting, updating, deleting, etc., which
        makes Sedna a worthy option for object persistence.  ZODB can store anything
        picklable.  Similarly, Sedna can store anything that can be represented in XML.
        
        Sedna has ACID transactions, triggers, indexes, support for ODBC within XQuery,
        SQL database-like user/permission management, and many other interesting and
        useful features.
        
        zif.sedna provides
        
        - a connection and query interface to a Sedna server
        
        - a dbapi-like interface (e.g., connections and cursors)
        
        - a database adapter for zope(3) with connection pooling and (provisional)
        thread safety.
        
        - sednaobject, which provides pythonic interfaces to the Sedna server for
        CRUD operations. It abstracts read-only query results into python
        sequence-like items and also provides a read-write elementtree-like
        interface for managing individual elements and their descendents.
        
        - SednaXQuery, for operations like handling SELECT results in SQL
        
        - SednaContainer, for operations like working with a table or view in SQL
        
        - SednaObjectifiedElement, for operations like modifying a record in SQL
        
        See 'src/zif/sedna/README.txt' for more information and doctest examples.
        See 'src/zif/sedna/README_da.txt' to use the zope3 database adapter in zope.
        See 'src/zif/sedna/README_sednaobject.txt' for sednaobject usage and doctests.
        See 'src/zif/sedna/README_pylons.txt' to use the zope3 database adapter in
        pylons.
        
        Releases
        ********
        
        ====================
        0.9 beta (2008/02/07)
        ====================
        Initial release
        
        ======================
        0.9 beta2 (2008/02/15)
        ======================
        Support pyformat %(var)s for atomic values in BasicCursor.
        Improved thread friendliness.
        Preliminary instructions for use with pylons.
        
        ========================
        0.10 alpha1 (2008/03/23)
        ========================
        sednaobject provided. Abstractions for pythonic CRUD operations.
        lxml now required
        
        ========================
        0.10 alpha2 (2008/03/30)
        ========================
        renamed sednaobject.SednaXPath to SednaXQuery
        renamed sednaobject.SednaElement to SednaContainer
        added sednaobject.SednaObjectifiedElement, a lightweight wrapper around
        lxml.objectify, for operating with record-like objects.
        more parser-agnostic about results
        
        
        Download
        **********************
        
Keywords: sedna xml database zope persistence xquery
Platform: UNKNOWN
