# Ingen Ontology # Copyright (C) 2008 David Robillard # # This document describes classes and properties that define a "patch" or # "graph" representing a dataflow program or system. It borrows heavily # from the LV2 specification which describes plugins # for signal processing. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE. @prefix : . @prefix doap: . @prefix foaf: . @prefix lv2: . @prefix rdf: . @prefix rdfs: . @prefix xsd: . <> a lv2:Specification ; doap:name "Ingen" ; doap:homepage ; doap:maintainer [ a foaf:Person ; foaf:name "David Robillard" ; foaf:homepage ; rdfs:seeAlso ] . ############ ## Plugin ## ############ :Plugin a rdfs:Class ; rdfs:label "Plugin" ; rdfs:comment """ A class which can be instantiated into a :Node. A plugin has a set of input and output "ports". In practise this class is semantically equivalent to lv2:Plugin, it only exists to allow the ingen ontology to be useful for "plugins" that aren't semantically LV2 plugins. See the LV2 specification for details about the required properties (rdf:type, doap:name, doap:license, and lv2:port). """ . lv2:Plugin rdfs:subClassOf :Plugin . ########### ## Patch ## ########### :Patch a rdfs:Class ; rdfs:subClassOf :Plugin ; rdfs:label "Patch" ; rdfs:comment """ A collection of Nodes connected together form a Patch, which is itself a :Plugin (and thus can be part of another patch, and so on) """ . :node a rdf:Property ; rdfs:domain :Patch ; rdfs:range :Node ; rdfs:label "node" ; rdfs:comment "Signifies a patch contains some node." . :polyphony a rdf:Property ; rdfs:domain :Patch ; rdfs:range xsd:integer ; rdfs:label "Polyphony" ; rdfs:comment """ The amount of polyphony in a Patch. This defines the number of voices present on all :polyphonic children of this patch. Because a Patch is also a Node, a Patch may have both :polyphony and :polyphonic properties. These specify different things: :polyphony specifies the voice count of the Patch's children, and :polyphonic specifies whether the patch is seen as polyphonic to the Patch's parent. """ . ############ ## Object ## ############ :Object a rdfs:Class ; rdfs:label "Ingen Object" ; rdfs:comment """ A signal processing object which is part of a Patch. An Object MUST have exactly one lv2:symbol property. This MAY be inferred from the URI where possible (e.g. in a system which publishes node URIs in a heirarchial way such that the parent can be 'chopped' to get a legal symbol). """ . :polyphonic a rdf:Property ; rdfs:domain :Object ; rdfs:range xsd:boolean ; rdfs:label "Polyphonic" ; rdfs:comment """ Signifies this object should be replicated when it is part of a polyphonic patch. The amount of polyphony (i.e. the number of voices) is determined by the :polyphony property of the containing patch. This is a boolean property which defines whether the parent can access each voice individuall: All objects within a patch are either polyphonic or not from their parent's perspective. An Object may itself have "internal" polyphony but not be polyphonic according to this property, if those voices are mixed down. """ . ########## ## Node ## ########## :Node a rdfs:Class ; rdfs:subClassOf :Object ; rdfs:label "Node" ; rdfs:comment """ An instance of a Plugin. Since a Patch is a Plugin, an instance of a Patch is also a Node. A Node inherits all the properties of the plugin of which it is an instance, but may have properties of its own: any properties of the node take precedence over properties of the node's plugin. This way a node can be expressed as a lightweight set of changes (e.g. input values) from its plugin or patch which may be defined elsewhere. A node MUST have at least one rdf:instanceOf property which is a subclass of :Plugin. When there are many such properties, an applications SHOULD use the most specific class it understands. """ . :enabled a rdf:Property ; rdfs:domain :Node ; rdfs:range xsd:boolean ; rdfs:label "Enabled" ; rdfs:comment "Signifies the node is or should be running." . ########## ## Port ## ########## :Port a rdfs:Class ; rdfs:subClassOf :Object ; rdfs:label "Port" ; rdfs:comment """ A Port is an input or output on a Node. It is implicitly an instance of the corresponding port on that Node's plugin (specified with rdf:instanceOf). A Port MUST have a legal lv2:symbol in the exact way a Node must, see :Node documentation for details. Ports inherit properties from the Port on their parent's Plugin in the exact way Nodes inherit properties from their Plugin. """ . ################ ## Connection ## ################ :Connection a rdfs:Class ; rdfs:label "Connection" ; rdfs:comment """ A connection between two ports. Patches have a set of connections which define how its component nodes and ports are connected. A Connection MUST have exactly one :source property and exactly one :destination property. """ . :source a rdf:Property ; rdfs:domain :Connection ; rdfs:range :Port ; rdfs:label "Source" ; rdfs:comment "The source/sending port of this connection" . :destination a rdf:Property ; rdfs:domain :Connection ; rdfs:range :Port ; rdfs:label "Destination" ; rdfs:comment "The destination/receiving/sink port of this connection" .