Add OWL types.

Fix lv2:minimum, lv2:maximum, and lv2:minimum (definition did not match the reality of their usage) (Spec bug found with Pellet).
Move project description metadata to manifest.
Remove invalid (non-DL) OWL restrictions, and use of Turtle collection syntax (there is at least one broken implementation in the wild that fails to parse this).

LV2 is now almost, but not quite, a valid OWL DL Ontology.

3 files changed, 110 insertions, 125 deletions

diff --git a/core.lv2/ChangeLog b/core.lv2/ChangeLog
index 5043095..0d7db59 100644
--- a/core.lv2/ChangeLog
+++ b/core.lv2/ChangeLog
@@ -7,6 +7,9 @@ lv2core (UNRELEASED) unstable; urgency=low
   * Move lv2:AmplifierPlugin under lv2:DynamicsPlugin
   * Loosen domain restriction of lv2:optionalFeature and lv2:requiredFeature
     (to allow re-use in extensions)
+  * Fix definition of lv2:minimum etc. (used for values, not scale points)
+  * More precisely define properties with OWL
+  * Move project metadata to manifest
 
  -- David Robillard <d@drobilla.net>  UNRELEASED
 
diff --git a/core.lv2/lv2.ttl b/core.lv2/lv2.ttl
index 5b93418..4350f8b 100644
--- a/core.lv2/lv2.ttl
+++ b/core.lv2/lv2.ttl
@@ -27,15 +27,14 @@
 @prefix owl:  <http://www.w3.org/2002/07/owl#> .
 @prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .
 @prefix doap: <http://usefulinc.com/ns/doap#> .
-@prefix foaf: <http://xmlns.com/foaf/0.1/> .
 
 ####################
 ## Resource Class ##
 ####################
 
-lv2:Resource a rdfs:Class ;
+lv2:Resource a rdfs:Class , owl:Class ;
     rdfs:comment """
-An LV2 Resource (e.g. plugin, specification, or any other LV2 related thing)
+An LV2 Resource (e.g. plugin, specification, or any other LV2 related thing).
 """ .
 
 
@@ -43,7 +42,7 @@ An LV2 Resource (e.g. plugin, specification, or any other LV2 related thing)
 ## Specification Class ##
 #########################
 
-lv2:Specification a rdfs:Class ;
+lv2:Specification a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Resource ;
     rdfs:comment """
 An LV2 specification (i.e. this specification, or an LV2 extension).
@@ -59,28 +58,7 @@ more details.
 #######################
 
 <http://lv2plug.in/ns/lv2core>
-    a doap:Project , lv2:Specification ;
-    doap:license <http://usefulinc.com/doap/licenses/mit> ;
-    doap:name "LV2" ;
-    doap:homepage <http://lv2plug.in> ;
-    doap:created "2004-04-21" ;
-    doap:shortdesc "An audio plugin interface specification" ;
-    doap:programming-language "C" ;
-    doap:release [
-        doap:revision "3.2" ;
-        doap:created "2011-03-17"
-    ] ;
-    doap:maintainer [
-        a foaf:Person ;
-        foaf:name "Steve Harris" ;
-        foaf:homepage <http://plugin.org.uk/> ;
-        rdfs:seeAlso <http://plugin.org.uk/swh.xrdf>
-    ] , [
-        a foaf:Person ;
-        foaf:name "David Robillard" ;
-        foaf:homepage <http://drobilla.net/> ;
-        rdfs:seeAlso <http://drobilla.net/drobilla.rdf>
-    ] ;
+    a lv2:Specification ;
     lv2:documentation """
 <h4>Overview</h4>
 
@@ -174,7 +152,7 @@ plugin instances simultaneously.</p>
 ## Template/Plugin Classes ##
 #############################
 
-lv2:Template a rdfs:Class ;
+lv2:Template a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Resource ;
     rdfs:comment """
 An abstract plugin-like resource that may not actually be an LV2 plugin
@@ -183,17 +161,11 @@ may have ports, and otherwise mimic the structure of a plugin. This should be
 subclassed by extensions that define such things.
 """ .
     
-lv2:Plugin a rdfs:Class ;
+lv2:Plugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Template ;
     rdfs:label "Plugin" ;
     rdfs:subClassOf [
         a owl:Restriction ;
-        owl:onProperty rdf:type ;
-        owl:hasValue lv2:Plugin ;
-        rdfs:comment """
-A Plugin MUST have at least one rdf:type that is lv2:Plugin.
-""" ] , [
-        a owl:Restriction ;
         owl:onProperty doap:name ;
         owl:someValuesFrom xsd:string ;
         rdfs:comment """
@@ -203,6 +175,12 @@ with no language tag.
     lv2:documentation """
 <p>The class which represents an LV2 plugin.</p>
 
+<p>To be discovered by hosts, plugins MUST explicitly have rdf:type lv2:Plugin
+listed in their bundle's manifest, e.g.:</p>
+<pre>
+&lt;http://example.org/my-plugin&gt; a lv2:Plugin .
+</pre>
+
 <p>Plugins SHOULD have a doap:license property whenever possible. The doap:name
 property should be at most a few words in length using title capitalization,
 e.g. <q>Tape Delay Unit</q>. Use doap:shortdesc or doap:description for more
@@ -214,31 +192,13 @@ detailed descriptions.</p>
 ## Port Classes ##
 ##################
 
-lv2:Port a rdfs:Class ;
+lv2:Port a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Resource ;
     rdfs:label   "Port" ;
     rdfs:subClassOf [
-        a owl:Restriction ;
-        owl:onProperty rdf:type ;
-        owl:someValuesFrom [
-            a owl:DataRange ;
-            owl:oneOf ( lv2:Port lv2:InputPort lv2:OutputPort )
-        ] ;
-        rdfs:comment """
-A Port MUST have at least one rdf:type property that is one of lv2:Port,
-lv2:InputPort, or lv2:OutputPort.
-""" ] , [
-        a owl:Restriction ;
-        owl:onProperty rdf:type ;
-        owl:minCardinality 2 ;
-        rdfs:comment """
-A Port MUST have at least two rdf:type properties that are some
-subclass of lv2:Port (one for lv2:Port, lv2:InputPort, or lv2:OutputPort,
-and another to describe the specific data type, e.g. lv2:AudioPort).
-"""  ] , [
          a owl:Restriction ;
          owl:onProperty lv2:index ;
-         owl:someValuesFrom xsd:nonNegativeInteger ;
+         owl:allValuesFrom xsd:nonNegativeInteger ;
          owl:cardinality 1 ;
          rdfs:comment """
 A port MUST have a single lv2:index which is of type xsd:nonNegativeInteger
@@ -283,7 +243,7 @@ necessarily refer to the same port on all plugins with a given URI (i.e. the
 index for a port may differ between plugin binaries).</p>
 """ .
 
-lv2:InputPort a rdfs:Class ;
+lv2:InputPort a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Port ;
     rdfs:label "Input port" ;
     rdfs:comment """
@@ -291,7 +251,7 @@ Ports of this type will be connected to a pointer to some value, which will
 be read by the plugin during their run method.
 """ .
 
-lv2:OutputPort a rdfs:Class ;
+lv2:OutputPort a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Port ;
     rdfs:label "Output port" ;
     rdfs:comment """
@@ -299,7 +259,7 @@ Ports of this type will be connected to a pointer to some value, which will
 be written to by the plugin during their run method.
 """ .
 
-lv2:ControlPort a rdfs:Class ;
+lv2:ControlPort a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Port ;
     rdfs:label "Control port" ;
     lv2:documentation """
@@ -308,7 +268,7 @@ type <code>float</code>.</p>
 
 """ .
 
-lv2:AudioPort a rdfs:Class ;
+lv2:AudioPort a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Port ;
     rdfs:label "Audio port" ;
     lv2:documentation """
@@ -321,13 +281,13 @@ with elements of C type <code>float</code>.</p>
 ## Mandatory Plugin RDF Properties ##
 #####################################
 
-lv2:port a rdf:Property ;
+lv2:port a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Template ;
     rdfs:range lv2:Port ;
     rdfs:label "port" ;
     rdfs:comment "Relates a Template or Plugin to the Ports it contains" .
 
-lv2:minorVersion a rdf:Property ;
+lv2:minorVersion a rdf:Property , owl:DatatypeProperty ;
     rdfs:domain lv2:Resource ;
     rdfs:range xsd:nonNegativeInteger ;
     rdfs:label "minor version" ;
@@ -401,7 +361,7 @@ href="http://lv2plug.in/ns/lv2core#minorVersion">lv2:minorVersion</a>, the
 property which describes the other half.</p>
 """ .
 
-lv2:microVersion a rdf:Property ;
+lv2:microVersion a rdf:Property , owl:DatatypeProperty ;
     rdfs:domain lv2:Resource ;
     rdfs:range xsd:nonNegativeInteger ;
     rdfs:label "micro version" ;
@@ -419,12 +379,11 @@ documentation on LV2 resource versioning, see <a
 href="http://lv2plug.in/ns/lv2core#minorVersion">lv2:minorVersion</a>.</p>
 """ .
 
-lv2:binary a rdf:Property ;
+lv2:binary a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Resource ;
-    rdfs:range rdfs:Resource ;
+    rdfs:range owl:Thing ;
     rdfs:label "binary" ;
     lv2:documentation """
-
 <p>The binary of an LV2 resource. The value of this property must be a URI that
 resolves to a shared library object (the actual type of this library is system
 specific).</p>
@@ -436,8 +395,8 @@ be used to access the descriptor for that plugin. This property may be used
 similarly by extensions to relate other resources to their implementations.</p>
 """ .
 
-lv2:appliesTo a rdf:Property ;
-	rdfs:domain rdfs:Resource ;
+lv2:appliesTo a rdf:Property , owl:ObjectProperty ;
+	rdfs:domain lv2:Resource ;
 	rdfs:range lv2:Plugin ;
 	rdfs:label "Applies to" ;
 	lv2:documentation """
@@ -464,7 +423,7 @@ not the plugin itself.</p>
 ## Documentation                  ##
 ####################################
 
-lv2:documentation a rdf:Property ;
+lv2:documentation a rdf:Property , owl:DatatypeProperty ;
     rdfs:range rdfs:Literal ;
     rdfs:label "documentation" ;
     rdfs:seeAlso <http://www.w3.org/TR/xhtml-basic/> ;
@@ -486,7 +445,7 @@ devices). See <a href="http://www.w3.org/TR/xhtml-basic/#s_xhtmlmodules"
 ## Mandatory Port RDF Properties ##
 ###################################
 
-lv2:index a rdf:Property ;
+lv2:index a rdf:Property , owl:DatatypeProperty ;
     rdfs:domain lv2:Port ;
     rdfs:range xsd:nonNegativeInteger ;
     rdfs:label "index" ;
@@ -495,8 +454,7 @@ Specifies the index of the port, passed as an argument to the connect port
 function. The index uniqely identifies the port on an instance of the plugin.
 """ .
 
-lv2:symbol a rdf:Property ;
-    rdfs:domain lv2:Resource ;
+lv2:symbol a rdf:Property , owl:DatatypeProperty ;
     rdfs:label "symbol" ;
     rdfs:comment """
 A short name used as a machine and human readable identifier.
@@ -509,7 +467,7 @@ identifies the port on a plugin with a given URI (i.e. the plugin author MUST
 change the plugin URI if a port symbol is changed or removed).
 """ .
 
-lv2:name a rdf:Property ;
+lv2:name a rdf:Property , owl:DatatypeProperty ;
     rdfs:domain lv2:Port ;
     rdfs:label "name" ;
     rdfs:comment """
@@ -525,7 +483,7 @@ property without changing the Plugin URI.
 ## Optional Port RDF Properties ##
 ##################################
 
-lv2:Point a rdfs:Class ;
+lv2:Point a rdfs:Class , owl:Class ;
     rdfs:label "Port value point" ;
     rdfs:comment """
 Used to describe interesting values in a Port's range. To be valid it
@@ -535,26 +493,26 @@ There are 3 specially defined Points in the LV2 specification (default,
 minimum, and maximum), though future extensions may define more.
 """ .
 
-lv2:ScalePoint a rdfs:Class ;
+lv2:ScalePoint a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Point ;
     rdfs:comment "A single float Point (for control inputs)." .
 
-lv2:scalePoint a rdf:Property ;
+lv2:scalePoint a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Port ;
     rdfs:range lv2:ScalePoint ;
     rdfs:label "Scale point" ;
     rdfs:comment "Relates a Port to its ScalePoints." .
 
-lv2:default a rdf:Property ;
-    rdfs:subPropertyOf lv2:scalePoint ;
+lv2:default a rdf:Property , owl:DatatypeProperty ;
+    rdfs:domain lv2:Port ;
     rdfs:label "Default value" ;
     rdfs:comment """
 The default value that the host SHOULD set this port to when there is no
 other information available.
 """ .
 
-lv2:minimum a rdf:Property ;
-    rdfs:subPropertyOf lv2:scalePoint ;
+lv2:minimum a rdf:Property , owl:DatatypeProperty ;
+    rdfs:domain lv2:Port ;
     rdfs:label "Minimum value" ;
     lv2:documentation """
 A hint to the host for the minimum useful value that the port will use.  This
@@ -562,8 +520,8 @@ is a <q>soft</q> limit; the plugin is required to gracefully accept all values
 in the range of a port's data type.
 """ .
 
-lv2:maximum a rdf:Property ;
-    rdfs:subPropertyOf lv2:scalePoint ;
+lv2:maximum a rdf:Property , owl:DatatypeProperty ;
+    rdfs:domain lv2:Port ;
     rdfs:label "Maximum value" ;
     lv2:documentation """
 <p>A hint to the host for the maximum useful value that the port will use.
@@ -576,14 +534,14 @@ values in the range of a port's data type.</p>
 ## Features ##
 ##############
 
-lv2:Feature a rdfs:Class ;
+lv2:Feature a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Resource ;
     rdfs:label "Feature" ;
     rdfs:comment """
 An additional feature which a plugin or other resource may use or require.
 """.
 
-lv2:optionalFeature a rdf:Property ;
+lv2:optionalFeature a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Resource ;
     rdfs:range lv2:Feature ;
     rdfs:label "Optional feature" ;
@@ -594,7 +552,7 @@ the plugin in LV2_Descriptor::instantiate(). The plugin MUST NOT fail to
 instantiate if an optional feature is not supported by the host.</p>
 """ .
 
-lv2:requiredFeature a rdf:Property ;
+lv2:requiredFeature a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Resource ;
     rdfs:range lv2:Feature ;
     rdfs:label "Required feature" ;
@@ -612,14 +570,14 @@ instantiate is strongly discouraged).</p>
 ## PortProperties ##
 ####################
 
-lv2:PortProperty a rdfs:Class ;
+lv2:PortProperty a rdfs:Class , owl:Class ;
     rdfs:label "Port property" ;
     rdfs:comment """
 A port property - a useful piece of information that allows a host to make more
 sensible decisions (e.g. to provide a better interface).
 """ .
 
-lv2:portProperty a rdf:Property ;
+lv2:portProperty a rdf:Property , owl:ObjectProperty ;
     rdfs:domain lv2:Port ;
     rdfs:range lv2:PortProperty ;
     rdfs:label "Port property" ;
@@ -753,53 +711,53 @@ input value (i.e. round the input value down).
 ## Plugin Classes ##
 ####################
 
-lv2:GeneratorPlugin a rdfs:Class ;
+lv2:GeneratorPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Generator" ;
     rdfs:comment """
 Any plugin that generates sound internally, rather than processing its input.
 """ .
 
-lv2:InstrumentPlugin a rdfs:Class ;
+lv2:InstrumentPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:GeneratorPlugin ;
     rdfs:label "Instrument" ;
     rdfs:comment """
 Any plugin that is intended to be played as a musical instrument.
 """ .
 
-lv2:OscillatorPlugin a rdfs:Class ;
+lv2:OscillatorPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:GeneratorPlugin ;
     rdfs:label "Oscillator" .
 
-lv2:UtilityPlugin a rdfs:Class ;
+lv2:UtilityPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Utility" ;
     rdfs:comment """
 Includes things like mathematical functions and non-musical delays.
 """ .
 
-lv2:ConverterPlugin a rdfs:Class ;
+lv2:ConverterPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:UtilityPlugin ;
     rdfs:label "Converter" ;
     rdfs:comment """
 Any plugin that converts some form of input into a different form of output.
 """ .
 
-lv2:AnalyserPlugin a rdfs:Class ;
+lv2:AnalyserPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:UtilityPlugin ;
     rdfs:label "Analyser" ;
     rdfs:comment """
 Any plugin that analyses input to output some useful information.
 """ .
 
-lv2:MixerPlugin a rdfs:Class ;
+lv2:MixerPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:UtilityPlugin ;
     rdfs:label "Mixer" ;
     rdfs:comment """
 A plugin which mixes some number of inputs into some number of outputs.
 """ .
 
-lv2:SimulatorPlugin a rdfs:Class ;
+lv2:SimulatorPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Simulator" ;
     rdfs:comment """
@@ -807,72 +765,72 @@ Plugins that aim to duplicate the effect of some environmental effect or
 musical equipment.
 """ .
 
-lv2:DelayPlugin a rdfs:Class ;
+lv2:DelayPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Delay" ;
     rdfs:comment """
 Plugins that intentionally delay their input signal as an effect.
 """ .
 
-lv2:ModulatorPlugin a rdfs:Class ;
+lv2:ModulatorPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Modulator" .
 
-lv2:ReverbPlugin a rdfs:Class ;
+lv2:ReverbPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:subClassOf lv2:SimulatorPlugin ;
     rdfs:subClassOf lv2:DelayPlugin ;
     rdfs:label "Reverb" .
 
-lv2:PhaserPlugin a rdfs:Class ;
+lv2:PhaserPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:ModulatorPlugin ;
     rdfs:label "Phaser" .
 
-lv2:FlangerPlugin a rdfs:Class ;
+lv2:FlangerPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:ModulatorPlugin ;
     rdfs:label "Flanger" .
 
-lv2:ChorusPlugin a rdfs:Class ;
+lv2:ChorusPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:ModulatorPlugin ;
     rdfs:label "Chorus" .
 
-lv2:FilterPlugin a rdfs:Class ;
+lv2:FilterPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Filter" .
 
-lv2:LowpassPlugin a rdfs:Class ;
+lv2:LowpassPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Lowpass" .
 
-lv2:BandpassPlugin a rdfs:Class ;
+lv2:BandpassPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Bandpass" .
 
-lv2:HighpassPlugin a rdfs:Class ;
+lv2:HighpassPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Highpass" .
 
-lv2:CombPlugin a rdfs:Class ;
+lv2:CombPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Comb" .
 
-lv2:AllpassPlugin a rdfs:Class ;
+lv2:AllpassPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Allpass" .
 
-lv2:EQPlugin a rdfs:Class ;
+lv2:EQPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:FilterPlugin ;
     rdfs:label "Equaliser" .
 
-lv2:ParaEQPlugin a rdfs:Class ;
+lv2:ParaEQPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:EQPlugin ;
     rdfs:label "Parametric" .
 
-lv2:MultiEQPlugin a rdfs:Class ;
+lv2:MultiEQPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:EQPlugin ;
     rdfs:label "Multiband" .
 
-lv2:SpatialPlugin a rdfs:Class ;
+lv2:SpatialPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Spatial" ;
     rdfs:comment """
@@ -880,56 +838,56 @@ Plugins that manipulate the position of audio in space (e.g. panning,
 stereo width, surround encoding, etc.).
 """ .
 
-lv2:SpectralPlugin a rdfs:Class ;
+lv2:SpectralPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Spectral" ;
     rdfs:comment """
 Plugins that alter the spectral properties (e.g. frequency) of audio.
 """ .
 
-lv2:PitchPlugin a rdfs:Class ;
+lv2:PitchPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:SpectralPlugin ;
     rdfs:label "Pitch Shifter" .
 
-lv2:AmplifierPlugin a rdfs:Class ;
+lv2:AmplifierPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DynamicsPlugin ;
     rdfs:label "Amplifier" .
 
-lv2:DistortionPlugin a rdfs:Class ;
+lv2:DistortionPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Distortion" .
 
-lv2:WaveshaperPlugin a rdfs:Class ;
+lv2:WaveshaperPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DistortionPlugin ;
     rdfs:label "Waveshaper" .
 
-lv2:DynamicsPlugin a rdfs:Class ;
+lv2:DynamicsPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:Plugin ;
     rdfs:label "Dynamics" ;
     rdfs:comment """
 Plugins that alter the envelope or dynamic range of audio.
 """ .
 
-lv2:CompressorPlugin a rdfs:Class ;
+lv2:CompressorPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DynamicsPlugin ;
     rdfs:label "Compressor" .
 
-lv2:ExpanderPlugin a rdfs:Class ;
+lv2:ExpanderPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DynamicsPlugin ;
     rdfs:label "Expander" .
 
-lv2:LimiterPlugin a rdfs:Class ;
+lv2:LimiterPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DynamicsPlugin ;
     rdfs:label "Limiter" .
 
-lv2:GatePlugin a rdfs:Class ;
+lv2:GatePlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:DynamicsPlugin ;
     rdfs:label "Gate" .
 
-lv2:FunctionPlugin a rdfs:Class ;
+lv2:FunctionPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:UtilityPlugin ;
     rdfs:label "Function" .
 
-lv2:ConstantPlugin a rdfs:Class ;
+lv2:ConstantPlugin a rdfs:Class , owl:Class ;
     rdfs:subClassOf lv2:GeneratorPlugin ;
     rdfs:label "Constant" .
diff --git a/core.lv2/manifest.ttl b/core.lv2/manifest.ttl
index 454a0c5..c4f134d 100644
--- a/core.lv2/manifest.ttl
+++ b/core.lv2/manifest.ttl
@@ -1,8 +1,32 @@
-@prefix lv2: <http://lv2plug.in/ns/lv2core#>.
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
+@prefix doap: <http://usefulinc.com/ns/doap#> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 
 <http://lv2plug.in/ns/lv2core>
-	a lv2:Specification ;
+	a doap:Project , lv2:Specification ;
 	lv2:minorVersion 3 ;
 	lv2:microVersion 2 ;
-	rdfs:seeAlso <lv2.ttl> .
+	rdfs:seeAlso <lv2.ttl> ;
+    doap:license <http://usefulinc.com/doap/licenses/mit> ;
+    doap:name "LV2" ;
+    doap:homepage <http://lv2plug.in> ;
+    doap:created "2004-04-21" ;
+    doap:shortdesc "An audio plugin interface specification" ;
+    doap:programming-language "C" ;
+    doap:release [
+        doap:revision "3.2" ;
+        doap:created "2011-03-17"
+    ] ;
+    doap:maintainer [
+        a foaf:Person ;
+        foaf:name "Steve Harris" ;
+        foaf:homepage <http://plugin.org.uk/> ;
+        rdfs:seeAlso <http://plugin.org.uk/swh.xrdf>
+    ] , [
+        a foaf:Person ;
+        foaf:name "David Robillard" ;
+        foaf:homepage <http://drobilla.net/> ;
+        rdfs:seeAlso <http://drobilla.net/drobilla.rdf>
+    ] .
+