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+# LV2 Event Extension
+# Copyright 2008-2011 David Robillard <http://drobilla.net>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+@prefix dcs: <http://ontologi.es/doap-changeset#> .
+@prefix doap: <http://usefulinc.com/ns/doap#> .
+@prefix ev: <http://lv2plug.in/ns/ext/event#> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
+@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#> .
+
+<http://drobilla.net/drobilla#me>
+ a foaf:Person ;
+ foaf:name "David Robillard" ;
+ foaf:homepage <http://drobilla.net/> ;
+ foaf:mbox <mailto:d@drobilla.net> ;
+ rdfs:seeAlso <http://drobilla.net/drobilla> .
+
+_:larsl
+ a foaf:Person ;
+ foaf:name "Lars Luthman" .
+
+<http://lv2plug.in/ns/ext/event>
+ a lv2:Specification ;
+ doap:license <http://opensource.org/licenses/isc> ;
+ doap:name "LV2 Event" ;
+ doap:shortdesc "A port-based real-time generic event interface." ;
+ rdfs:seeAlso <event-helpers.h> ;
+ doap:release [
+ doap:revision "1.4" ;
+ doap:created "2011-11-21" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-event-1.4.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Update packaging."
+ ]
+ ]
+ ] , [
+ doap:revision "1.2" ;
+ doap:created "2011-05-26" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-event-1.2.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Add build system (for installation)."
+ ] , [
+ rdfs:label "Convert documentation to HTML and use lv2:documentation."
+ ] , [
+ rdfs:label "Use lv2:Specification to be discovered as an extension."
+ ]
+ ]
+ ] , [
+ doap:revision "1.0" ;
+ doap:created "2010-11-24" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-event-1.0.tar.gz> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Initial release."
+ ]
+ ]
+ ] ;
+ doap:developer <http://drobilla.net/drobilla#me> ,
+ _:larsl ;
+ lv2:documentation """
+<p>This extension defines a generic time-stamped event port type, which can be
+used to create plugins that read and write real-time events, such as MIDI,
+OSC, or any other type of event payload. The type(s) of event supported by
+a port is defined in the data file for a plugin, for example:</p>
+<pre class="turtle-code">
+&lt;http://example.org/some-plugin&gt;
+ lv2:port [
+ a ev:EventPort, lv2:InputPort ;
+ lv2:index 0 ;
+ ev:supportsEvent &lt;http://lv2plug.in/ns/ext/midi#MidiEvent&gt; ;
+ lv2:symbol "midi_input" ;
+ lv2:name "MIDI input" ;
+ ] .
+</pre>
+""" .
+
+ev:EventPort
+ a rdfs:Class ;
+ rdfs:label "Event port" ;
+ rdfs:subClassOf lv2:Port ;
+ rdfs:comment """
+Ports of this type will be connected to a struct of type LV2_Event_Buffer,
+defined in event.h. These ports contain a sequence of generic events
+(possibly several types mixed in a single stream), the specific types of
+which are defined by some URI in another LV2 extension.
+""" .
+
+ev:Event
+ a rdfs:Class ;
+ rdfs:label "LV2 event" ;
+ rdfs:comment """
+A single generic time-stamped event.
+
+An ev:EventPort contains an LV2_Event_Buffer which contains a sequence
+of these events. The binary format of LV2 events is defined by the
+LV2_Event struct in event.h.
+
+Specific event types (e.g. MIDI, OSC) are defined by extensions, and should
+be rdfs:subClassOf this class.
+""" .
+
+ev:TimeStamp
+ a rdfs:Class ;
+ rdfs:label "LV2 event time stamp" ;
+ rdfs:comment """
+The time stamp of an Event.
+
+This defines the meaning of the 'frames' and 'subframes' fields of an
+LV2_Event (both unsigned 32-bit integers).
+""" .
+
+ev:FrameStamp
+ a rdfs:Class ;
+ rdfs:subClassOf ev:TimeStamp ;
+ rdfs:label "Audio frame time stamp" ;
+ rdfs:comment """
+The default time stamp unit for an LV2 event: the frames field represents
+audio frames (in the sample rate passed to intantiate), and the subframes
+field is 1/UINT32_MAX of a frame.
+""" .
+
+ev:generic
+ a lv2:PortProperty ;
+ rdfs:label "Generic event port" ;
+ rdfs:comment """
+Indicates that this port does something meaningful for any event type
+(e.g. event mixers, delays, serialisers, etc). If this property is set, hosts
+should consider the port suitable for any type of event. Otherwise, hosts
+should consider the port 'appropriate' only for the specific event types
+listed with :supportsEvent. Note that plugins must gracefully handle unknown
+event types whether or not this property is present.
+""" .
+
+ev:supportsEvent
+ a rdf:Property ;
+ rdfs:domain lv2:Port ;
+ rdfs:range ev:Event ;
+ rdfs:label "Supports event type" ;
+ rdfs:comment """
+Indicates that this port supports or "understands" a certain event type.
+For input ports, this means the plugin understands and does something useful
+with events of this type. For output ports, this means the plugin may generate
+events of this type. If the plugin never actually generates events of this type,
+but might pass them through from an input, this property should not be set (use
+ev:inheritsEvent for that).
+Plugins with event input ports must always gracefully handle any type of event,
+even if it does not 'support' it. This property should always be set for
+event types the plugin understands/generates so hosts can discover plugins
+appropriate for a given scenario (e.g. plugins with a MIDI input).
+Hosts are not expected to consider event ports suitable for some type of
+event if the relevant :supportsEvent property is not set, unless the
+ev:generic property for that port is also set.
+""" .
+
+ev:inheritsEvent
+ a rdf:Property ;
+ rdfs:domain lv2:Port ;
+ rdfs:range lv2:Port ;
+ rdfs:label "Inherits event type" ;
+ rdfs:comment """
+Indicates that this output port might pass through events that arrived at some
+other input port (or generate an event of the same type as events arriving at
+that input). The host must always check the stamp type of all outputs when
+connecting an input, but this property should be set whenever it applies.
+""" .
+
+ev:supportsTimeStamp
+ a rdf:Property ;
+ rdfs:domain lv2:Port ;
+ rdfs:range ev:TimeStamp ;
+ rdfs:label "Supports time stamp type" ;
+ rdfs:comment """
+Indicates that this port supports or "understands" a certain time stamp type.
+Meaningful only for input ports, the host must never connect a port to an
+event buffer with a time stamp type that isn't supported by the port.
+""" .
+
+ev:generatesTimeStamp
+ a rdf:Property ;
+ rdfs:domain lv2:Port ;
+ rdfs:range ev:TimeStamp ;
+ rdfs:label "Outputs time stamp type" ;
+ rdfs:comment """
+Indicates that this port may output a certain time stamp type, regardless of
+the time stamp type of any input ports. If the port outputs stamps based on
+what type inputs are connected to, this property should not be set (use the
+ev:inheritsTimeStamp property for that). Hosts MUST check the time_stamp value
+of any output port buffers after a call to connect_port on ANY event input
+port on the plugin. If the plugin changes the stamp_type field of an output
+event buffer during a call to run(), the plugin must call the
+stamp_type_changed function provided by the host in the LV2_Event_Feature
+struct, if it is non-NULL.
+""" .
+
+ev:inheritsTimeStamp
+ a rdf:Property ;
+ rdfs:domain lv2:Port ;
+ rdfs:range lv2:Port ;
+ rdfs:label "Inherits time stamp type" ;
+ rdfs:comment """
+Indicates that this port follows the time stamp type of an input port.
+This property is not necessary, but it should be set for outputs that
+base their output type on an input port so the host can make more sense
+of the plugin and provide a more sensible interface.
+""" .