presets
type: Specification
license: isc
name: LV2 Presets
shortdesc: Presets for LV2 plugins.
created: 2009-00-00
developer: me
release:
  revision: 2.7
  created: 2012-07-29
  blame: me
  changeset:
    item: Use consistent label style.
release:
  revision: 2.6
  created: 2012-04-17
  file-release: lv2-1.0.0.tar.bz2
  blame: me
  changeset:
    item: Add pset:preset property for describing the preset currently applied to a plugin instance.
    item: Remove pset:appliesTo property, use lv2:appliesTo instead.
    item: Merge with unified LV2 package.
release:
  revision: 2.2
  created: 2011-11-21
  file-release: lv2-presets-2.2.tar.bz2
  blame: me
  changeset:
    item: Update packaging.
    item: Improve documentation.
release:
  revision: 2.0
  created: 2010-10-04
  file-release: lv2-presets-2.0.tar.gz
  blame: me
  changeset:
    item: Initial release.
documentation: This vocabulary describes a format for presets (i.e. named sets of control values and possibly other state) for LV2 plugins. The structure of a pset:Preset is deliberately identical to that of an lv2:Plugin, and can be thought of as a plugin template or overlay. Presets may be defined in any bundle, including the plugin's bundle, separate third party preset bundles, or user preset bundles saved by hosts. Since preset data tends to be large, it is recommended that plugins describe presets in a separate file(s) to avoid slowing down hosts. The manifest.ttl of a bundle containing presets should list the presets like so: eg:mypreset a pset:Preset ; lv2:appliesTo eg:myplugin ; rdfs:seeAlso <mypreset.ttl> .

LV2 Preset
type: Class
subclass of: PluginBase
subclass of: Restriction
  on property: label
  some values from: string
  comment: A Preset MUST have at least one string rdfs:label.
documentation: A Preset for an LV2 Plugin. The structure of a Preset deliberately mirrors that of a plugin, so existing predicates can be used to describe any data associated with the preset. For example: @prefix eg: <http://example.org/> . eg:mypreset a pset:Preset ; rdfs:label "One louder" ; lv2:appliesTo eg:myplugin ; lv2:port [ lv2:symbol "volume1" ; pset:value 11.0 ] , [ lv2:symbol "volume2" ; pset:value 11.0 ] . A Preset SHOULD have at least one lv2:appliesTo property. Each Port on a Preset MUST have at least a lv2:symbol property and a pset:value property.

value
type: Property
domain: Port
comment: Specifies the value of a Port on some Preset. This property is used in a similar way to e.g. lv2:default.

preset
type: Property
domain: PluginBase
range: LV2 Preset
documentation: Specifies the preset currently applied to a plugin instance. This property may be useful for saving state, or notifying a plugin instance at run-time about a preset change.