@prefix atom: <http://lv2plug.in/ns/ext/atom#> .
@prefix ev:   <http://lv2plug.in/ns/ext/event#> .
@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
@prefix midi: <http://lv2plug.in/ns/ext/midi#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@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/midi>
	a owl:Ontology ;
	rdfs:seeAlso <midi.h> ,
		<lv2-midi.doap.ttl> ;
	lv2:documentation """
<p>This specification defines a data type for a MIDI message, midi:MidiEvent,
which is normalised for fast and convenient real-time processing.  MIDI is the
<q>Musical Instrument Digital Interface</q>, a ubiquitous binary standard for
controlling digital music devices.</p>

<p>For plugins that process MIDI (or other situations where MIDI is sent via a
generic transport) the main type defined here, midi:MidiEvent, can be mapped to
an integer and used as the type of an LV2 <a
href="../atom/atom.html#Atom">Atom</a> or <a
href="../event/event.html#Event">Event</a>.</p>

<p>This specification also defines a complete human and machine readable
description of the MIDI standard (except for standard controller numbers).
These descriptions are detailed enough to express any MIDI message as
properties.</p>
""" .

midi:ActiveSense
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Active Sense Message" ;
	midi:status "FE"^^xsd:hexBinary .

midi:Aftertouch
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Aftertouch Message" ;
	midi:statusMask "A0"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:noteNumber
	] , [
		midi:byteNumber 1 ;
		midi:property midi:pressure
	] .

midi:Bender
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Bender Message" ;
	midi:statusMask "E0"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ,
			1 ;
		midi:property midi:benderValue
	] .

midi:ChannelPressure
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Channel Pressure Message" ;
	midi:statusMask "D0"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:pressure
	] .

midi:Chunk
	a rdfs:Class ;
	rdfs:label "MIDI Chunk" ;
	rdfs:comment "A series of contiguous bytes (usually one) in a message." .

midi:Clock
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Clock Message" ;
	midi:status "F8"^^xsd:hexBinary .

midi:Continue
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Continue Message" ;
	midi:status "FB"^^xsd:hexBinary .

midi:Controller
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Controller Change Message" ;
	midi:statusMask "B0"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:controllerNumber
	] , [
		midi:byteNumber 1 ;
		midi:property midi:controllerValue
	] .

midi:HexByte
	a rdfs:Datatype ;
	owl:onDatatype xsd:hexBinary ;
	owl:withRestrictions (
		[
			xsd:maxInclusive "FF"
		]
	) ;
	rdfs:comment "A hexadecimal byte, which is a xsd:hexBinary value <= FF" .

midi:MidiEvent
	a rdfs:Class ,
		rdfs:Datatype ;
	rdfs:label "MIDI Message" ;
	rdfs:subClassOf ev:Event ,
		atom:Atom ;
	owl:onDatatype xsd:hexBinary ;
	lv2:documentation """
<p>A single raw MIDI message (i.e. a sequence of bytes).</p>

<p>This is equivalent to a standard MIDI messages, except with the following
restrictions to simplify handling:</p>
<ul>
  <li>Running status is not allowed, every message must have its own status
  byte.</li>

  <li>Note On messages with velocity 0 are not allowed.  These messages are
  equivalent to Note Off in standard MIDI streams, but here only proper Note
  Off messages are allowed.</li>

  <li>"Realtime messages" (status bytes 0xF8 to 0xFF) are allowed, but may
  not occur inside other messages like they can in standard MIDI streams.</li>

  <li>All messages are complete valid MIDI messages.  This means, for example,
  that only the first byte in each event (the status byte) may have the eighth
  bit set, that Note On and Note Off events are always 3 bytes long, etc.
  Where messages are communicated, the writer is responsible for writing valid
  messages, and the reader may assume that all events are valid.</li>
</ul>

<p>If a midi:MidiEvent is serialised to a string, the format should be
xsd:hexBinary, e.g. (in Turtle notation):</p>

<pre class="turtle-code">
[] eg:someEvent "901A01"^^midi:MidiEvent .
</pre>
""" .

midi:NoteOff
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Note Off Message" ;
	midi:statusMask "80"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:noteNumber
	] , [
		midi:byteNumber 1 ;
		midi:property midi:velocity
	] .

midi:NoteOn
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Note On Message" ;
	midi:statusMask "90"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:noteNumber
	] , [
		midi:byteNumber 1 ;
		midi:property midi:velocity
	] .

midi:ProgramChange
	a rdfs:Class ;
	rdfs:subClassOf midi:VoiceMessage ;
	rdfs:label "Program Change Message" ;
	midi:statusMask "C0"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ;
		midi:property midi:programNumber
	] .

midi:QuarterFrame
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemCommon ;
	rdfs:label "Quarter Frame Message" ;
	midi:status "F1"^^xsd:hexBinary .

midi:Reset
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Reset Message" ;
	midi:status "FF"^^xsd:hexBinary .

midi:SongPosition
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemCommon ;
	rdfs:label "Song Position Pointer Message" ;
	midi:status "F2"^^xsd:hexBinary ;
	midi:chunk [
		midi:byteNumber 0 ,
			1 ;
		midi:property midi:songPosition
	] .

midi:SongSelect
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemCommon ;
	rdfs:label "Song Select Message" ;
	midi:status "F3"^^xsd:hexBinary .

midi:Start
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Start Message" ;
	midi:status "FA"^^xsd:hexBinary .

midi:Stop
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemRealtime ;
	rdfs:label "Stop Message" ;
	midi:status "FC"^^xsd:hexBinary .

midi:SystemCommon
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemMessage ;
	rdfs:label "System Common Message" .

midi:SystemExclusive
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemMessage ;
	rdfs:label "System Exclusive Message" ;
	midi:status "F0"^^xsd:hexBinary .

midi:SystemMessage
	a rdfs:Class ;
	rdfs:subClassOf midi:MidiEvent ;
	rdfs:label "System Message" ;
	midi:statusMask "F0"^^xsd:hexBinary .

midi:SystemRealtime
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemMessage ;
	rdfs:label "System Realtime Message" .

midi:TuneRequest
	a rdfs:Class ;
	rdfs:subClassOf midi:SystemCommon ;
	rdfs:label "Tune Request Message" ;
	midi:status "F6"^^xsd:hexBinary .

midi:VoiceMessage
	a rdfs:Class ;
	rdfs:subClassOf midi:MidiEvent ;
	rdfs:label "Voice Message" ;
	midi:statusMask "F0"^^xsd:hexBinary .

midi:benderValue
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "bender value" ;
	rdfs:range xsd:short ;
	rdfs:comment "The value of a pitch bender (-8192 to 8192)." .

midi:binding
	a rdf:Property ,
		owl:ObjectProperty ;
	rdfs:range midi:MidiEvent ;
	rdfs:label "binding" ;
	lv2:documentation """
<p>The MIDI event to bind a parameter to.  This describes which MIDI events
should be used to control a port, parameter, or other object.  The binding
should be a midi:MidiEvent but the property that represents the control value may
be omitted.  For example, to bind to the value of controller 17:</p>

<pre class="turtle-code">
port midi:binding [
    a midi:Controller ;
    midi:controllerNumber 17
] .
</pre>
""" .

midi:byteNumber
	a rdf:Property ,
		owl:DatatypeProperty ;
	rdfs:label "byte number" ;
	rdfs:domain midi:Chunk ;
	rdfs:range xsd:unsignedByte ;
	rdfs:comment "The 0-based index of a byte which is part of this chunk." .

midi:channel
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "MIDI channel" ;
	rdfs:range xsd:unsignedByte ;
	rdfs:comment "The channel number of a MIDI message." .

midi:chunk
	a rdf:Property ;
	rdfs:range xsd:byte ,
		xsd:hexBinary ;
	rdfs:label "MIDI chunk" ;
	rdfs:comment "A chunk of a MIDI message." .

midi:controllerNumber
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "MIDI controller number" ;
	rdfs:range xsd:byte ;
	rdfs:comment "The numeric ID of a controller (0 to 127)." .

midi:controllerValue
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "MIDI controller value" ;
	rdfs:range xsd:byte ;
	rdfs:comment "The value of a controller (0 to 127)." .

midi:noteNumber
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "note number" ;
	rdfs:range xsd:byte ;
	rdfs:comment "The numeric ID of a note (0 to 127)." .

midi:pressure
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "key pressure" ;
	rdfs:range xsd:byte ;
	rdfs:comment "Key pressure (0 to 127)." .

midi:programNumber
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "program number" ;
	rdfs:range xsd:byte ;
	rdfs:comment "The numeric ID of a program (0 to 127)." .

midi:property
	a rdf:Property ,
		owl:ObjectProperty ,
		owl:FunctionalProperty ;
	rdfs:label "property" ;
	rdfs:domain midi:Chunk ;
	rdfs:range rdf:Property ;
	rdfs:comment "The property this chunk represents." .

midi:songNumber
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "song number" ;
	rdfs:range xsd:byte ;
	rdfs:comment "The numeric ID of a song (0 to 127)." .

midi:songPosition
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "song position" ;
	rdfs:range xsd:short ;
	rdfs:comment "Song position in MIDI beats (16th notes) (-8192 to 8192)." .

midi:status
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "status byte" ;
	rdfs:range midi:HexByte ;
	rdfs:comment "The exact status byte for a message of this type." .

midi:statusMask
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "status mask" ;
	rdfs:range midi:HexByte ;
	rdfs:comment """The status byte for a message of this type on channel 1, i.e. a status byte with the lower nibble set to zero.""" .

midi:velocity
	a rdf:Property ,
		owl:DatatypeProperty ,
		owl:FunctionalProperty ;
	rdfs:label "velocity" ;
	rdfs:range midi:HexByte ;
	rdfs:comment "The velocity of a note message (0 to 127)." .
