diff options
Diffstat (limited to 'ns/extensions/units/units.ttl')
| -rw-r--r-- | ns/extensions/units/units.ttl | 106 |
1 files changed, 87 insertions, 19 deletions
diff --git a/ns/extensions/units/units.ttl b/ns/extensions/units/units.ttl index ccd5cf4..ab33723 100644 --- a/ns/extensions/units/units.ttl +++ b/ns/extensions/units/units.ttl @@ -20,6 +20,21 @@ @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 xsd: <http://www.w3.org/2001/XMLSchema#> . +@prefix dcs: <http://ontologi.es/doap-changeset#> . + +<http://plugin.org.uk/swh.xrdf#me> + a foaf:Person ; + foaf:name "Steve Harris" ; + foaf:homepage <http://plugin.org.uk/> ; + rdfs:seeAlso <http://plugin.org.uk/swh.xrdf> . + +<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> . <http://lv2plug.in/ns/extensions/units> a lv2:Specification ; @@ -29,8 +44,18 @@ doap:homepage <http://lv2plug.in/ns/extensions/units> ; doap:license <http://opensource.org/licenses/isc-license> ; doap:release [ - doap:revision "5.2" ; - doap:created "2011-08-21" + doap:revision "5.4" ; + doap:created "2011-11-20" ; + dcs:blame <http://drobilla.net/drobilla#me> ; + dcs:changeset [ + dcs:item [ + rdfs:label "Define used but undefined resources (units:name, units:render, units:symbol, units:Conversion, units:conversion, units:prefixConversion, units:to, and units:factor)." + ] , [ + rdfs:label "Update packaging." + ] , [ + rdfs:label "Improve documentation." + ] + ] ] ; doap:maintainer [ a foaf:Person ; @@ -49,8 +74,8 @@ <p>For example, to say that a gain port's value is in decibels (units:db)</p> <pre class="turtle-code"> -@prefix : <http://lv2plug.in/ns/extensions/units#> . -@prefix eg: <http://example.org/> . +@prefix units: <http://lv2plug.in/ns/extensions/units#> . +@prefix eg: <http://example.org/> . eg:plugin lv2:port [ a lv2:ControlRateInputPort ; @@ -58,7 +83,7 @@ eg:plugin lv2:port [ lv2:index 0 ; lv2:symbol "gain" ; lv2:name "gain" ; - :unit :db + units:unit units:db ] . </pre> @@ -80,20 +105,10 @@ eg:plugin lv2:port [ ] . </pre> -<p>Units are defined by a number of properties:</p> -<dl> -<dt>units:name</dt> -<dd>A display name for the unit (eg. decibels)</dd> -<dt>units:symbol</dt> -<dd>The abbreviated symbol for the unit (eg. dB)</dd> -<dt>units:render</dt> -<dd>A printf(3) string to be used to render the numerical value (eg. \"%f dB\")</dd> -<dt>units:conversion</dt> -<dd>Defines a conversion into another unit, commonly the SI unit for the -unit class (eg. units:conversion [ units:to units:m ; units:factor 1000 ]). -conversions are expressed as either factors (multiplicand for the conversion) -or offsets (addend for the conversion).</dd> -</dl> +<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:Unit a rdfs:Class ; @@ -105,6 +120,59 @@ units:unit rdfs:range units:Unit ; rdfs:comment "Relates a port to the unit of its data" . +units:name + a rdf:Property ; + rdfs:domain units:Unit ; + rdfs:range xsd:string ; + rdfs:comment "A display name for the unit (e.g. decibels)." . + +units:render + a rdf:Property ; + rdfs:domain units:Unit ; + rdfs:range xsd:string ; + rdfs:comment "A printf format string for rendering a value (eg. \"%f dB\")." . + +units:symbol + a rdf:Property ; + rdfs:domain units:Unit ; + rdfs:range xsd:string ; + rdfs:comment "The abbreviated symbol for the unit (e.g. dB)." . + +units:Conversion + a rdfs:Class ; + rdfs:comment "A conversion from one unit to another." . + +units:conversion + a rdf:Property ; + rdfs:domain units:Unit ; + rdfs:range units:Conversion ; + rdfs:comment "A conversion from this unit to another." . + +units:prefixConversion + a rdf:Property ; + rdfs:subPropertyOf units:conversion ; + rdfs:domain units:Unit ; + rdfs:range units:Conversion ; + rdfs:comment """ +A conversion from this unit to the same unit but with a different SI prefix +(e.g. Hz to kHz). +""" . + +units:to + a rdf:Property ; + rdfs:domain units:Conversion ; + rdfs:range units:Unit ; + rdfs:comment "The target unit this conversion converts to." . + +units:factor + a rdf:Property ; + rdfs:domain units:Conversion ; + rdfs:range units:Unit ; + rdfs:comment """ +The factor to multiple the source value by in order to convert +to the target unit. +""" . + units:s a units:Unit ; units:conversion [ units:factor 0.0166666666 ; |