Oracle XML DB Repository lets you version your data, implement and manage security, and use APIs to access and manipulate repository resources.

• Access to Oracle XML DB Repository Data
  There are several ways to access and manipulate data in Oracle XML DB Repository, including using standard protocols such as FTP and HTTP(S)/WebDAV; Oracle XML DB resource Application Program Interfaces (APIs); and the repository views RESOURCE_VIEW and PATH_VIEW.
• Configuration of Oracle XML DB Repository
  Overall configuration of Oracle XML DB Repository applies to all repository resources. It does not include configuring parameters for handling events or managing XLink and XInclude processing. You use resource configuration files to configure resources.
• Use of XLink and XInclude with Oracle XML DB
  You can use XLink and XInclude with resources in Oracle XML DB Repository. But the use of XLink is deprecated.
• Repository Access Using RESOURCE_VIEW and PATH_VIEW
  Predefined public views RESOURCE_VIEW and PATH_VIEW provide access to Oracle XML DB repository data. You can use Oracle SQL functions under_path and equals_path to query resources based on their path names, and functions path and depth to return resource path names and depths.
• Resource Versions
  Oracle XML DB Repository resources can be versioned. A record is kept of all changes to a resource that is under version control.
• PL/SQL Access to Oracle XML DB Repository
  PL/SQL packages DBMS_XDB_CONFIG and DBMS_XDB_REPOS together provide the Oracle XML DB resource application program interface (API) for PL/SQL. You use the former to configure Oracle XML DB and its repository. You use the latter to perform other, non-configuration operations on the repository.
• Repository Access Control
  Oracle Database provides classic database security such as row-level and column-level secure access by database users. It also provides fine-grained access control for resources in Oracle XML DB Repository. You can create, set, and modify access control lists (ACLs).
• Repository Access Using Protocols
  You can access Oracle XML DB Repository data using protocols FTP and HTTP(S)/WebDAV.
• User-Defined Repository Metadata
  You can create your own metadata to associate with XML data stored in Oracle XML DB Repository.
• Oracle XML DB Repository Events
  The use of repository events to trigger application actions is deprecated in Oracle Database 21c (21.3). There is no replacement.
• Guidelines for Oracle XML DB Applications in Java
  Design guidelines are presented for writing Oracle XML DB applications in Java. This includes guidelines for writing and configuring Java servlets for Oracle XML DB.
• Data Access Using URIs
  You can generate and store URIs in the database and use them to retrieve the database data they target. There are three kinds of URIs you can use this way: DBUris, XDBUris, and HTTPUris.
• Native Oracle XML DB Web Services
  Your applications can access Oracle Database using native Oracle XML DB Web services.