Download Database Solutions for Storing and Retrieving XML Documents

Database Solutions for Storing
and Retrieving XML Documents
IBM’s DB2 Relational Database
with the XML Extender
XML Extender Features
• XML document retrieval and generation
from SQL queries
• XML document storage
• data management functions
XML document retrieval
• Query syntax adheres to W3C standards
Extensive Stylesheet Language
Transformation(XSLI) and XML Path
Language(Xpath)
• entire documents can be retrieved
• XML elements can be dynamically
extracted
XML document generation
• XML Extender provides stored procedures
to generate XML documents from existing
data stored in DB2 tables
XML document storage
• DB2’s XML Extender Serves as a
Repository for XML documents and their
document type definitions (DTDs)
• an entire document can be stored as an
XML user-defined column
• the document can be decomposed into
multiple tables and columns
XML column option
• Document stored as user-defined type
column
• three XML user-defined types(UDTs):
XMLCLOB, XMLVARCHAR and XMLfile
• user-defined functions provided for insert,
select and update operations
UDTs
• XMLCLOB and XMLVARCHAR store an
XML document as a CLOB and a
VARCHAR respectively in DB2
• XMLFile stores an XML document as a file
on a local file system
XML collection
• An XML collection is a set of relational
tables that contain data mapped to an XML
document
• Data access definition(DAD) is used to
define the mapping of document type
definitions(DTD) to relational tables and
columns
• stored procedures for select, insert, update
XML column vs XML collection
• XML column provides a simple way to
manage XML documents and provides fast
searching and indexing capabilities
• ideal for static data not frequently updated
• better performance since no need to
compose the document from DB2 data
• XML collection provides a better mapping
for an XML document which consists of
multiple collections
• XML collection also supports existing DB2
data by providing a mechanism to generate
an XML document for data interchange
Provides Data Management
Functions
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Data integrity
security
recoverability
manageability
Invoking DB2 XML Extender
• You can invoke DB2 XML Extender in a
data access JavaBean through through
WebSphere or in a Net.Data macro
• It can be used with DB2 or any ODBCcompliant database
Other Database Solutions
• MicroSoft SQL Server
• Oracle’s Oracle8i database
Conclusion
• IBM DB2 XML Extender and DB2
Universal Net.Data provide an end-to-end
solution for storing and retrieving XML
documents for business-to-business and
business-to-consumer (with a browser)
processing.