|Oracle® XML DB Developer's Guide
10g Release 2 (10.2)
|PDF · Mobi · ePub|
This section describes the new features and functionality, enhancements, APIs, and product integration support added to Oracle XML DB for Oracle Database 10g Release 2 (10.2). New features information from previous releases is also retained to help those users migrating to the current release.
The following sections describe the new features in Oracle XML DB:
XQuery, the new W3C XML query language, is supported. SQL functions
XMLTable have been added:
XMLQuery lets you construct XML data and query XML and relational data using the XQuery language.
XMLTable lets you create relational tables and columns from XQuery query results. SQL*Plus command
xquery has also been added, to let you execute XQuery expressions directly. See Chapter 17, "Using XQuery with Oracle XML DB".
New SQL functions have been added to help you update XML data in the database:
deleteXML. These new functions complement the functionality already provided by SQL function
updateXML, they are generally used in SQL DML statements. The new functions let you add and remove XML nodes in various ways. They can perform updates that are more localized than with
updateXML, which can greatly improve performance and make source code clearer and more concise. All of the functions are optimized using XPath Rewrite. See "Updating XML Instances and XML Data in Tables".
Support for the developing SQL/XML standard has been extended. The following SQL functions have been added:
XMLParse. Escaping of identifiers has also been updated, in accordance with a change to the SQL/XML standard. See "Generating XML Using SQL Functions".
You can now add and manipulate custom metadata for Oracle XML DB Repository resources that are XML Schema-based (in addition to non-schema-based). Resource metadata can be used to improve query performance and resource management. See Chapter 26, "User-Defined Repository Metadata".
XPath Rewrite can handle additional operations on more complex XML Schema constructs, including substitution groups, derived XML Schema types (inheritance), and SQL/XML collections. Performance has improved significantly for querying and updating XML Schema-based
XMLType data and SQL/XML views. See Chapter 6, "XPath Rewrite".
Oracle Database can now be used with HTTPS (HyperText Transfer Protocol, HTTP 1.1 as defined in the RFC2616 specification). HTTPS is a secure-access protocol. It can be configured for the database using the Oracle XML DB configuration file,
xdbconfig.xml. See "Configuring Secure HTTP (HTTPS)".
The (Java-based) Oracle XDK PL/SQL packages
XSL_PROCESSOR have been deprecated in favor of the (C-based) Oracle XML DB packages
DBMX_XSLPROCESSOR. Synonyms have been provided to smooth the migration of legacy applications. See "APIs for XML".
Automatic Storage Management (ASM) organizes database files into disk groups for simplified management and added benefits such as database mirroring and I/O balancing. DBAs can now access ASM resources in Oracle XML DB Repository using protocols and resource APIs (such as
DBMS_XDB). ASM files are accessed in the virtual repository folder
/sys/asm. See "Accessing ASM Files Using Protocols and Resource APIs – For DBAs".
The Transportable Tablespace feature works with
XMLType tables in Oracle XML DB. In particular, XML schemas are treated like any other database objects with respect to import and export: they are moved along with their associated tablespaces. See "Using Transportable Tablespaces with Oracle XML DB".
Oracle Enterprise Manager can now be used to manage the following Oracle XML DB features:
repository access control lists (ACLs)
XMLType tables and columns
This section summarizes the Oracle XML DB enhancements provided with Oracle Database 10g Release 2 (10.2).
Oracle Database 10g Release Notes
http://www.oracle.com/technology/tech/xml/ for the latest Oracle XML DB updates and notes
The IMPORT/EXPORT utility has been enhanced to help you load XML data into Oracle XML DB. See Chapter 30, "Importing and Exporting XMLType Tables".
Oracle Database 10g supports XML schema evolution by providing PL/SQL procedure
copyEvolve as part of package
In prior releases there was no standard procedure for schema evolution. Once registered with Oracle XML DB at a particular URL, an XML schema could not be modified, in case there were
XMLType tables dependent on the schema.
DBMS_XMLGEN now supports hierarchical queries. See Generating XML Using DBMS_XMLGEN.
In Oracle Database 10g Release 1 (10.1), XML data retrieved from the database is automatically converted to your client character set. In addition, using FTP or HTTP, you can use multibyte characters in a directory name, filename, or URL, and you can transfer or receive data encoded in a different character set from the database. For full support of all valid XML characters, use UTF-8 as your database character set.
The C API for XML is used for both Oracle XML Developer's Kit (XDK) and Oracle XML DB. This is a DOM API that can be used with XML inside or outside the database. See Chapter 14, "Using the C API for XML".
In Oracle Database 10g Release 1 (10.1), SQL*Loader supports
XMLType tables and columns. It can load
XMLType data, regardless of whether the data is stored as LOBs or in an object-relational manner. See Chapter 29, "Loading XML Data Using SQL*Loader".
DBMS_XMLGEN now has an option to turn off pretty-printing.
Oracle Database 10g Release 1 (10.1) offers the following Oracle Text enhancements:
CTXXPATH supports the following Xpath expressions:
Positional predicates such as
Attribute existence expressions such as
Highlighting is supported for
HASPATH operators for
The syntax for the XPath function
ora:contains has changed.
See Also:Chapter 10, "Full-Text Search Over XML"
Oracle Streams Advanced Queuing (AQ) Internet Data Access Presentation (iDAP) has been enhanced: you can now use the AQ XML servlet to access Oracle Database AQ using HTTP and Simple Object Access Protocol (SOAP). IDAP facilitates using AQ over the Internet.
IDAP is now the SOAP implementation for AQ operations; it defines the XML message structure used in the body of the SOAP request.
You can now use
XMLType as the AQ payload type, instead of embedding
XMLType as an attribute in an Oracle Database object type.