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-@prefix pprops: <http://lv2plug.in/ns/ext/port-props#> .
-@prefix doap: <http://usefulinc.com/ns/doap#> .
-@prefix foaf: <http://xmlns.com/foaf/0.1/> .
-@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
-@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
-
-<http://lv2plug.in/ns/ext/port-props>
-	a lv2:Specification ;
-	doap:name "LV2 Port Properties" ;
-	doap:release [
-		doap:revision "0.1" ;
-		doap:created "2011-11-01"
-	] ;
-	doap:created "2009-01-01" ;
-	doap:shortdesc "Additional properties for LV2 plugin ports." ;
-	doap:maintainer [
-		a foaf:Person ;
-		foaf:name "Krzysztof Foltman"
-	] , [
-		a foaf:Person ;
-		foaf:name "David Robillard" ;
-		rdfs:seeAlso <http://drobilla.net/drobilla.rdf>
-	] ;
-	lv2:documentation """
-<p>This extension defines several useful properties for LV2 plugin ports, which
-can be used in plugin descriptions to better describe ports.  Using this
-metadata, hosts can build better UIs for plugins, and provide more advanced
-automatic functionality.</p>
-""" .
-
-pprops:trigger
-	a lv2:PortProperty ;
-	rdfs:label "Trigger" ;
-	rdfs:comment """
-Indicates that the data item corresponds to a momentary event that has been
-detected (control output ports) or is to be triggered (control input ports).
-For input ports, the port needs to be reset to lv2:default value after run()
-function of the plugin has returned. If the control port is assigned a GUI
-widget by the host, the widget should be of auto-off (momentary, one-shot) type
-- for example, a push button if the port is also declared as lv2:toggled, or a
-series of push button or auto-clear input box with a "Send" button if the port
-is also lv2:integer.
-""" .
-
-pprops:supportsStrictBounds
-	a lv2:Feature ;
-	rdfs:label "Supports strict bounds" ;
-	rdfs:comment """
-Indicates use of host support for pprops:hasStrictBounds port property.  A
-plugin that specifies it as optional feature can omit value clamping for
-hasStrictBounds ports, if the feature is supported by the host.  When specified
-as required feature, it indicates that the plugin does not do any clamping for
-input ports that have a pprops:hasStrictBounds property.
-""" .
-
-pprops:hasStrictBounds
-	a lv2:PortProperty ;
-	rdfs:label "Has strict bounds" ;
-	rdfs:comment """
-For hosts that support pprops:supportsStrictBounds, this indicates that the
-value of the port should never exceed the port's minimum and maximum control
-points.  For input ports, it moves the responsibility for limiting the range of
-values to host, if it supports pprops:supportsStrictBounds.  For output ports,
-it indicates that values within specified range are to be expected, and
-breaking that should be considered by the host as error in plugin
-implementation.
-""" .
-
-pprops:expensive
-	a lv2:PortProperty ;
-	rdfs:label "Changes trigger expensive calculation" ;
-	rdfs:comment """
-Input ports only.  Indicates that any changes to the port value may trigger
-expensive background calculation (e.g. regenerate some lookup tables in a
-background thread).  Any value changes may have not have immediate effect, or
-may cause silence or diminished-quality version of the output until background
-processing is finished.  Ports having this property are typically not well
-suited for connection to outputs of other plugins, and should not be offered as
-connection targets or for automation by default.
-""" .
-
-pprops:causesArtifacts
-	a lv2:PortProperty ;
-	rdfs:label "May cause audio artifacts when changed" ;
-	rdfs:comment """
-Input ports only.  Indicates that any changes to the port value may produce
-slight artifacts to produced audio signals (zipper noise and other results of
-signal discontinuities).  Connecting ports of this type to continuous signals
-is not recommended, and when presenting a list of automation targets, those
-ports may be marked as artifact-producing.
-""" .
-
-pprops:continuousCV
-	a lv2:PortProperty ;
-	rdfs:label "Carries a smooth modulation signal" ;
-	rdfs:comment """
-Indicates that the port carries a "smooth" modulation signal.  Control input
-ports of this type are well-suited for being connected to sources of smooth
-signals (knobs with smoothing, modulation rate oscillators, output ports with
-continuousCV type, etc.).  Typically, the plugin with ports which have this
-property will implement appropriate smoothing to avoid audio artifacts.  For
-output ports, this property suggests the value of the port is likely to change
-frequently, and describes a smooth signal (e.g. successive values may be
-considered points along a curve).
-""" .
-
-pprops:discreteCV
-	a lv2:PortProperty ;
-	rdfs:label "Carries a discrete modulation signal" ;
-	rdfs:comment """
-Indicates that the port carries a "discrete" modulation signal.  Input ports of
-this type are well-suited for being connected to sources of discrete signals
-(switches, buttons, classifiers, event detectors, etc.).  May be combined with
-pprops:trigger property.  For output ports, this property suggests the value of
-the port describe discrete values that should be interpreted as steps (and not
-points along a curve).
-""" .
-
-pprops:reportsBpm
-	a lv2:PortProperty ;
-	rdfs:label "Carries the current tempo expressed in BPM" ;
-	rdfs:comment """
-Indicates that the port is used to pass the current tempo in context of the
-plugin (which may be current song tempo, or tempo of a particular subset of the
-song, or the subgraph the plugin resides in).  For input ports, the host may
-automatically feed the port with current tempo and hide the port from the user,
-unless the user or other factors encourage different behaviour.
-""" .
-
-pprops:reportsBeatsPerBar
-	a lv2:PortProperty ;
-	rdfs:label "Carries the current number of beats in a bar" ;
-	rdfs:comment """
-Indicates that the port may be used to pass the current number of beats in a
-bar.  """ .
-
-pprops:reportsBeatUnit
-	a lv2:PortProperty ;
-	rdfs:label "Carries the current beat size" ;
-	rdfs:comment """
-Indicates that the port may be used to pass the current size of a beat (4 for a
-crochet/quarter note, 8 for a quaver/eighth note, etc.).
-""" .
-
-pprops:logarithmic
-	a lv2:PortProperty ;
-	rdfs:label "Port value uses a logarithmic scale" ;
-	rdfs:comment """
-Indicates that port value behaviour within specified range (bounds) is a value
-using logarithmic scale.  The lower and upper bounds must be specified, and
-must be of the same sign.
-""" .
-
-pprops:notAutomatic
-	a lv2:PortProperty ;
-	rdfs:label "Port is not intended as a CV input" ;
-	rdfs:comment """
-Indicates that the port is not primarily intended to be fed with modulation
-signals from external sources (other plugins, etc.).  It is merely a UI hint
-and hosts may allow the user to override it.
-""" .
-
-pprops:notOnGUI
-	a lv2:PortProperty ;
-	rdfs:label "Port is not to be displayed on a GUI or equivalent" ;
-	rdfs:comment """
-Indicates that the port is not primarily intended to be represented by a
-separate control in the user interface window (or any similar mechanism used
-for direct, immediate control of control ports).  It is merely a UI hint and
-hosts may allow the user to override it.
-""" .
-
-pprops:priority
-	a rdf:Property ;
-	rdfs:domain lv2:Port ;
-	rdfs:range xsd:float ;
-	rdfs:label "Relative usefulness of a port" ;
-	rdfs:comment """
-Indicates how (typically) useful is the port comparing to other ports with that
-property (higher value = more important).  The values do not need to be unique,
-and ports can be grouped based on their priorities.
-""" .
-
-pprops:rangeSteps
-	a rdf:Property ;
-	rdfs:domain lv2:Port ;
-	rdfs:range xsd:nonNegativeInteger ;
-	rdfs:label "Number of value quantization steps" ;
-	lv2:documentation """
-<p>This value indicates into how many evenly-divided points the (control) port
-range shoujld be divided for step-wise control. This may be used for changing
-the value with step-based controllers like arrow keys, mouse wheel, rotary
-encoders, etc.</p>
-
-<p>Note that when used with a pprops:logarithmic port, the steps are
-logarithmic too, and port value can be calculated as:</p>
-
-<pre class="c-code">
-value = lower * pow(upper / lower, step / (steps - 1))
-</pre>
-
-<p>and the step from value is:</p>
-
-<pre class="c-code">
-step = (steps - 1) * log(value / lower) / log(upper / lower)
-</pre>
-
-<p>where:</p>
-<ul>
-<li><code>value</code> is the port value</li>
-<li><code>step</code> is the step number (0..steps)</li>
-<li><code>steps</code> is the number of steps (= value of :rangeSteps property)</li>
-<li><code>lower</code> and <code>upper</code> are the bounds</li>
-</ul>
-""" .