diff options
Diffstat (limited to 'lv2/units')
| -rw-r--r-- | lv2/units/units.meta.ttl | 46 | ||||
| -rw-r--r-- | lv2/units/units.ttl | 83 |
2 files changed, 80 insertions, 49 deletions
diff --git a/lv2/units/units.meta.ttl b/lv2/units/units.meta.ttl index c55b9de..bb40547 100644 --- a/lv2/units/units.meta.ttl +++ b/lv2/units/units.meta.ttl @@ -1,7 +1,9 @@ @prefix dcs: <http://ontologi.es/doap-changeset#> . @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#> . +@prefix units: <http://lv2plug.in/ns/extensions/units#> . <http://lv2plug.in/ns/extensions/units> a doap:Project ; @@ -106,5 +108,47 @@ ] ] ; doap:developer <http://plugin.org.uk/swh.xrdf#me> ; - doap:maintainer <http://drobilla.net/drobilla#me> . + doap:maintainer <http://drobilla.net/drobilla#me> ; + lv2:documentation """ + +This is a vocabulary for units typically used for control values in audio +processing. + +For example, to say that a gain control is in decibels: + + :::turtle + @prefix units: <http://lv2plug.in/ns/extensions/units#> . + @prefix eg: <http://example.org/> . + + eg:plugin lv2:port [ + a lv2:ControlPort , lv2:InputPort ; + lv2:index 0 ; + lv2:symbol "gain" ; + lv2:name "Gain" ; + units:unit units:db + ] . + +Using the same form, plugins may also specify one-off units inline, to give +better display hints to hosts: + + :::turtle + eg:plugin lv2:port [ + a lv2:ControlPort , lv2:InputPort ; + lv2:index 0 ; + lv2:symbol "frob" ; + lv2:name "frob level" ; + units:unit [ + a units:Unit ; + rdfs:label "frobnication" ; + units:symbol "fr" ; + units:render "%f f" + ] + ] . + +It is also possible to define conversions between various units, which makes it +possible for hosts to automatically convert between units where possible. The +units defined in this extension include conversion definitions where it makes +sense to do so. + +"""^^lv2:Markdown . diff --git a/lv2/units/units.ttl b/lv2/units/units.ttl index c81bf22..0f0efe0 100644 --- a/lv2/units/units.ttl +++ b/lv2/units/units.ttl @@ -9,53 +9,16 @@ a owl:Ontology , lv2:Specification ; owl:imports <http://lv2plug.in/ns/lv2core> ; + rdfs:label "LV2 Units" ; + rdfs:comment "Units for LV2 values." ; rdfs:seeAlso <units.h> , - <units.meta.ttl> ; - lv2:documentation """ -<p>This vocabulary defines a number of units for use in audio processing.</p> - -<p>For example, to say that a gain port's value is in decibels (units:db)</p> -<pre class="turtle-code"> -@prefix units: <http://lv2plug.in/ns/extensions/units#> . -@prefix eg: <http://example.org/> . - -eg:plugin lv2:port [ - a lv2:ControlPort , lv2:InputPort ; - lv2:index 0 ; - lv2:symbol "gain" ; - lv2:name "gain" ; - units:unit units:db -] . -</pre> - -<p>Using the same form, plugins may also specify one-off units inline, to give -better display hints to hosts:</p> -<pre class="turtle-code"> -eg:plugin lv2:port [ - a lv2:ControlPort , lv2:InputPort ; - lv2:index 0 ; - lv2:symbol "frob" ; - lv2:name "frob level" ; - units:unit [ - a units:Unit ; - rdfs:label "frobnication" ; - units:symbol "fr" ; - units:render "%f f" - ] -] . -</pre> - -<p>It is also possible to define conversions between various units, which makes -it possible for hosts to automatically and generically convert from a given -unit to a desired unit. The units defined in this extension include conversion -definitions where it makes sense to do so.</p> -""" . + <units.meta.ttl> . units:Unit a rdfs:Class , owl:Class ; rdfs:label "Unit" ; - rdfs:comment "A unit for LV2 port data" . + rdfs:comment "A unit for a control value." . units:unit a rdf:Property , @@ -70,7 +33,7 @@ units:render rdfs:label "unit format string" ; rdfs:domain units:Unit ; rdfs:range xsd:string ; - rdfs:comment """A printf format string for rendering a value (eg. "%f dB").""" . + rdfs:comment """A printf format string for rendering a value (e.g., "%f dB").""" . units:symbol a rdf:Property , @@ -78,7 +41,7 @@ units:symbol rdfs:label "unit symbol" ; rdfs:domain units:Unit ; rdfs:range xsd:string ; - rdfs:comment "The abbreviated symbol for the unit (e.g. dB)." . + rdfs:comment """The abbreviated symbol for this unit (e.g., "dB").""" . units:Conversion a rdfs:Class , @@ -107,7 +70,7 @@ units:prefixConversion rdfs:domain units:Unit ; rdfs:range units:Conversion ; rdfs:label "prefix conversion" ; - rdfs:comment "A conversion from this unit to the same unit but with a different SI prefix (e.g. Hz to kHz)." . + rdfs:comment "A conversion from this unit to another with the same base but a different prefix." . units:to a rdf:Property , @@ -131,6 +94,7 @@ units:s units:to units:min ] ; rdfs:label "seconds" ; + rdfs:comment "Seconds, the SI base unit for time." ; units:prefixConversion [ units:factor 1000 ; units:to units:ms @@ -141,6 +105,7 @@ units:s units:ms a units:Unit ; rdfs:label "milliseconds" ; + rdfs:comment "Milliseconds (thousandths of seconds)." ; units:prefixConversion [ units:factor 0.001 ; units:to units:s @@ -155,24 +120,28 @@ units:min units:to units:s ] ; rdfs:label "minutes" ; + rdfs:comment "Minutes (60s of seconds and 60ths of an hour)." ; units:render "%f mins" ; units:symbol "min" . units:bar a units:Unit ; rdfs:label "bars" ; + rdfs:comment "Musical bars or measures." ; units:render "%f bars" ; units:symbol "bars" . units:beat a units:Unit ; rdfs:label "beats" ; + rdfs:comment "Musical beats." ; units:render "%f beats" ; units:symbol "beats" . units:frame a units:Unit ; rdfs:label "audio frames" ; + rdfs:comment "Audio frames or samples." ; units:render "%f frames" ; units:symbol "frames" . @@ -183,6 +152,7 @@ units:m units:to units:inch ] ; rdfs:label "metres" ; + rdfs:comment "Metres, the SI base unit for length." ; units:prefixConversion [ units:factor 100 ; units:to units:cm @@ -203,6 +173,7 @@ units:cm units:to units:inch ] ; rdfs:label "centimetres" ; + rdfs:comment "Centimetres (hundredths of metres)." ; units:prefixConversion [ units:factor 0.01 ; units:to units:m @@ -223,6 +194,7 @@ units:mm units:to units:inch ] ; rdfs:label "millimetres" ; + rdfs:comment "Millimetres (thousandths of metres)." ; units:prefixConversion [ units:factor 0.001 ; units:to units:m @@ -243,6 +215,7 @@ units:km units:to units:mile ] ; rdfs:label "kilometres" ; + rdfs:comment "Kilometres (thousands of metres)." ; units:prefixConversion [ units:factor 1000 ; units:to units:m @@ -259,26 +232,29 @@ units:km units:inch a units:Unit ; units:conversion [ - units:factor 2.54 ; - units:to units:cm + units:factor 0.0254 ; + units:to units:m ] ; rdfs:label "inches" ; + rdfs:comment "An inch, defined as exactly 0.0254 metres." ; units:render "%f\"" ; units:symbol "in" . units:mile a units:Unit ; units:conversion [ - units:factor 1.6093 ; - units:to units:km + units:factor 1609.344 ; + units:to units:m ] ; rdfs:label "miles" ; + rdfs:comment "A mile, defined as exactly 1609.344 metres." ; units:render "%f mi" ; units:symbol "mi" . units:db a units:Unit ; rdfs:label "decibels" ; + rdfs:comment "Decibels, a logarithmic relative unit where 0 is unity." ; units:render "%f dB" ; units:symbol "dB" . @@ -289,6 +265,7 @@ units:pc units:to units:coef ] ; rdfs:label "percent" ; + rdfs:comment "Percentage, a ratio as a fraction of 100." ; units:render "%f%%" ; units:symbol "%" . @@ -299,12 +276,14 @@ units:coef units:to units:pc ] ; rdfs:label "coefficient" ; + rdfs:comment "A scale coefficient where 1 is unity, or 100 percent." ; units:render "* %f" ; units:symbol "" . units:hz a units:Unit ; rdfs:label "hertz" ; + rdfs:comment "Hertz, or inverse seconds, the SI derived unit for frequency." ; units:prefixConversion [ units:factor 0.001 ; units:to units:khz @@ -318,6 +297,7 @@ units:hz units:khz a units:Unit ; rdfs:label "kilohertz" ; + rdfs:comment "Kilohertz (thousands of Hertz)." ; units:prefixConversion [ units:factor 1000 ; units:to units:hz @@ -331,6 +311,7 @@ units:khz units:mhz a units:Unit ; rdfs:label "megahertz" ; + rdfs:comment "Megahertz (millions of Hertz)." ; units:prefixConversion [ units:factor 1000000 ; units:to units:hz @@ -344,6 +325,7 @@ units:mhz units:bpm a units:Unit ; rdfs:label "beats per minute" ; + rdfs:comment "Beats Per Minute (BPM), the standard unit for musical tempo." ; units:prefixConversion [ units:factor 0.0166666666 ; units:to units:hz @@ -358,6 +340,7 @@ units:oct units:to units:semitone12TET ] ; rdfs:label "octaves" ; + rdfs:comment "Octaves, relative musical pitch where +1 octave doubles the frequency." ; units:render "%f octaves" ; units:symbol "oct" . @@ -368,6 +351,7 @@ units:cent units:to units:semitone12TET ] ; rdfs:label "cents" ; + rdfs:comment "Cents (hundredths of semitones)." ; units:render "%f ct" ; units:symbol "ct" . @@ -378,18 +362,21 @@ units:semitone12TET units:to units:oct ] ; rdfs:label "semitones" ; + rdfs:comment "A semitone in the 12-tone equal temperament scale." ; units:render "%f semi" ; units:symbol "semi" . units:degree a units:Unit ; rdfs:label "degrees" ; + rdfs:comment "An angle where 360 degrees is one full rotation." ; units:render "%f deg" ; units:symbol "deg" . units:midiNote a units:Unit ; rdfs:label "MIDI note" ; + rdfs:comment "A MIDI note number." ; units:render "MIDI note %d" ; units:symbol "note" . |