The “local metadata” plugin has been created to allow extra, “metadata” to be defined and assigned to various context level elements in Moodle. It is an abstraction of the current “user profile field” functionality in Moodle and contains much of the same code.
The data model includes context level identifiers to allow the same data tables and API’s to be used for all of the different context levels. The plugin has been designed with the ability to be adopted into core, and completely replace the current user profile field feature if desired.
In its current concept state, the plugin provides metadata functionality for users, courses, activity modules, groups, cohorts and course caregories. Other context levels can be added through the context subplugin. NOTE, that the user metadata provided by the plugin is “in addition to” the current profile data rather than replacing it. For now, it is really intended to show/prove that this could replace the user profile data feature.
The plugin provides two subplugin types:
- Data contexts - These subplugins provide a Moodle context to apply metadata to.
- Data field types - These subplugins are the same as the user profile data types plugins.
Since it is a plugin, it can only provide interfaces that are available to plugins. For example, adding specific data to defined course metadata elements must be done through a different interface form than the main course settings form. The plugin takes advantages of Moodle hooks and callbacks that allow screens and menus to be added to, where they exist. If brought into core, these would be able to be more tightly integrated (this could also be better integrated if/when the proposed “hook” system provides more hooking points).
The plugin can be retrieved from https://github.com/PoetOS/moodle-local_metadata. It should be installed into the Moodle “/local/metadata/” directory (the “metadata” subdirectory needs to be created). Make sure that the “/local/metadata/” directory contains the root of the plugin.
Goto https://github.com/PoetOS/moodle-local_metadata/blob/master/walkthrough.pdf for a walkthrough of the plugin in its current state.
zhifen lin modification
In Project OER. I have modified this plugin (for context level course) to work together with plugin 'local_lom', so that a course's LOM-based metadata can be set and published over oai-pmh interface. please also refer to the Readme file in local_lom