You can access documents in the repository in any of the following ways:. Oracle XML DB provides standard database features such as transaction control, data integrity, replication, reliability, availability, security, and scalability, while also allowing for efficient indexing, querying, updating, and searching of XML documents in an XML-centric manner. In a relational database, the table-row metaphor locates content.
Primary-Key Foreign-Key relationships help define the relationships between content. Content is accessed and updated using the table-row-column metaphor. XML, on the other hand, uses hierarchical techniques to achieve the same functionality.
XMLType is an abstract data type that provides different storage models to best fit your data and your use of it. As an abstract data type, your applications and database queries gain in flexibility: the same interface is available for all XMLType operations. This is also referred to as post-parse persistence. Object-relational storage — XMLType data is stored as a set of objects.
This is also referred to as structured storage and object-based persistence. Starting with Oracle Database 12c Release 1 Use binary XML storage instead.
With the use of appropriate indexes, binary XML storage offers good performance for most use cases. However, some advanced use cases can benefit from using object-relational storage. Your application code need not change. You can change XML storage options when tuning your application. The tablespace for the XMLType table does not use automatic segment space management. A setting in file init.
An XML schema uses vocabulary defined by the schema for schemas to create a collection of XML Schema type definitions and element declarations that comprise a vocabulary for describing the contents and structure of a new class of XML documents, the XML instance documents that conform to that XML schema. The XML Schema language provides strong typing of elements and attributes. It defines numerous scalar data types. This base set of data types can be extended to define more complex types, using object-oriented techniques such as inheritance and extension.
The XML Schema vocabulary also includes constructs that you can use to define complex types, substitution groups, repeating sets, nesting, ordering, and so on. XML schemas are commonly used as a mechanism for checking validating whether XML instance documents conform with their specifications. The entities are the only information used from the DTD. Inline DTD Definitions. Any DTD validations and entity declaration handling are done at this point.
However, once parsed, the entity references are replaced with actual values and the original entity reference is lost. External DTD Definitions. Table lists these views. Registered XML schemas owned by the current user. Registered XML schemas usable by the current user. XMLType tables owned by the current user. XMLType tables usable by the current user. XMLType table columns owned by the current user.
XMLType table columns usable by the current user. XMLType views owned by the current user. XMLType views usable by the current user. XMLType view columns owned by the current user. XMLType view columns usable by the current user. Oracle Database Reference. Applications that use JDBC, such as those based on servlets, need prior knowledge of the data structure they are processing.
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