@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@prefix pset: <http://lv2plug.in/ns/ext/presets#> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .

<http://lv2plug.in/ns/ext/presets>
	a owl:Ontology ;
	rdfs:seeAlso <lv2-presets.doap.ttl> ;
	lv2:documentation """
<p>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.</p>

<p>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:</p>

<pre class="turtle-code">
eg:mypreset
    a             pset:Preset ;
    lv2:appliesTo eg:myplugin ;
    rdfs:seeAlso  &lt;mypreset.ttl&gt; .
</pre>
""" .

pset:Preset
	a rdfs:Class ;
	rdfs:subClassOf lv2:PluginBase ;
	rdfs:label "LV2 Preset" ;
	rdfs:subClassOf [
		a owl:Restriction ;
		owl:onProperty rdfs:label ;
		owl:someValuesFrom xsd:string ;
		rdfs:comment "A Preset MUST have at least one string rdfs:label."
	] ;
	lv2:documentation """
<p>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:</p>

<pre class="turtle-code">
@prefix eg: &lt;http://example.org/&gt; .

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
    ] .
</pre>

<p>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.</p>
""" .

pset:value
	a rdf:Property ;
	rdfs:domain lv2:Port ;
	rdfs:label "value" ;
	rdfs:comment """
Specifies the value of a Port on some Preset.  This property is used
in a similar way to e.g. lv2:default.
""" .

pset:preset
	a rdf:Property ;
	rdfs:domain lv2:PluginBase ;
	rdfs:range pset:Preset ;
	rdfs:label "preset" ;
	lv2:documentation """
<p>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.</p>
""" .