# API Reference

Table of Contents

grilo — Metadata library supporting several services
Plug-in management
  GrlRegistry — Grilo plugins loader and manager
Data sources
  GrlPlugin — Base class for Grilo Plugins
  GrlSource — Abstract base class for sources
Capabilities and Options
  GrlCaps — Describes the capabilities of a source for a given operation.
  GrlOperationOptions — Describes the options to be passed to an operation
Search in multiple sources
  Multiple — Search in multiple loaded sources
Configuring plug-ins
  GrlConfig — Configuration data storage
Media data
  GrlData — Low-level class for storing metadata information about media resources provided by GrlSource objects.
  GrlRelatedKeys — A class where to store related metadata keys.
  GrlMedia — A multimedia data transfer object
Misc
  grl-metadata-key — General media key definition
  grl-log — Log system
  grl-error
  grl-definitions
  grl-operation
  grl-util — utility functions

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