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+@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 ;
+	doap:name "LV2 Units" ;
+	doap:shortdesc "Units for LV2 values." ;
+	doap:created "2007-02-06" ;
+	doap:homepage <http://lv2plug.in/ns/extensions/units> ;
+	doap:license <http://opensource.org/licenses/isc> ;
+	doap:developer <http://plugin.org.uk/swh.xrdf#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 .