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+# LV2 Files Extension
+# Copyright 2010-2011 David Robillard <d@drobilla.net>
+# 
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+@prefix atom:  <http://lv2plug.in/ns/ext/atom#> .
+@prefix doap:  <http://usefulinc.com/ns/doap#> .
+@prefix files: <http://lv2plug.in/ns/ext/files#> .
+@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/files>
+	a lv2:Specification ;
+    doap:name "LV2 Files" ;
+    doap:shortdesc "A standard for referring to files in plugin state." ;
+    doap:license <http://opensource.org/licenses/isc-license> ;
+    doap:release [
+        doap:revision "0.2" ;
+        doap:created "2011-04-05"
+    ] ;
+    doap:maintainer [
+        a foaf:Person ;
+        foaf:name     "David Robillard" ;
+        foaf:homepage <http://drobilla.net/> ;
+        rdfs:seeAlso  <http://drobilla.net/drobilla.rdf>
+    ] ;
+	lv2:documentation """
+<p>This extension provides a mechanism for plugins to portably refer to files
+in persistent plugin state (using the <a
+href="http://lv2plug.in/ns/ext/persist">LV2 Persist</a> extension), and create
+instance-local files in host-defined locations (e.g. for recording).</p>
+
+<p>The motivating idea behind this extension is that all details of file
+management MUST be handled by the host since different hosts may have very
+different requirements.  Plugins MUST NOT make any assumption about file system
+locations beyond what is explicitly guaranteed by this extension.</p>
+
+<p>This extension defines two features: files:newFileSupport allows plugins to
+create new files within an instance-specific namespace at any time (except in
+realtime contexts); while files:pathSupport allows plugins to refer to file
+paths in plugin state in a way transparent to the host.</p>
+
+<p>To create a new file, the plugin MUST request a path from the host using
+LV2_Files_New_File_Support::new_file_path().  Thus, the host may choose an
+appropriate location for the file (e.g. a writable path on the appropriate disk
+volume or a path within a session directory) using information not available to
+the plugin.</p>
+
+<p>To store a path in persistent state, the plugin MUST map it to an
+<q>abstract path</q> using LV2_Files_Path_Support::abstract_path().  To use a
+path loaded from persistent state, the plugin MUST map the (abstract) path to
+an absolute path using LV2_Files_Path_Support::absolute_path().  Thus, the host
+can manage all paths used in a session and support exporting sessions to a
+portable self-contained format for archival or distribution.</p> """ .
+
+files:pathSupport a lv2:Feature ;
+   rdfs:label "Support for storing file paths in plugin state" ;
+   lv2:documentation """
+<p>This feature allows plugins to refer to pre-existing or newly created files
+in persistent plugin state in a portable way.  To support this feature a host
+MUST pass a LV2_Files_Path_Support structure to the plugin's
+LV2_Descriptor::instantiate() method as an LV2_Feature with LV2_Feature::URI =
+LV2_FILES_PATH_SUPPORT_URI and LV2_Feature::data pointed to an instance of
+LV2_Files_Path_Support.</p>
+
+<p>Plugins MUST use the functions provided by this feature to handle
+<em>all</em> paths saved to, or restored from, persistent plugin state;
+otherwise broken and/or non-portable state will silently be created resulting
+in a broken user experience.</p>
+""" .
+
+files:newFileSupport a lv2:Feature ;
+   rdfs:label "Support for creating new files" ;
+   lv2:documentation """
+<p>This feature allows plugins to create new files local to that plugin
+instance.  To support this feature a host MUST pass a
+LV2_Files_New_File_Support structure to the plugin's
+LV2_Descriptor::instantiate() method as an LV2_Feature with LV2_Feature::URI =
+LV2_FILES_NEW_FILE_SUPPORT_URI and LV2_Feature::data pointed to an instance of
+LV2_Files_New_File_Support.</p>
+""" .
+
+files:AbstractPath a rdfs:Class ;
+    rdfs:label "File Path" ;
+    lv2:documentation """
+<p>An abstract path to a file in persistent plugin state.</p>
+
+<p>The format of a files:AbstractPath is a C string escaped or otherwise
+restricted in a system-specific manner.  This URI,
+<q>http://lv2plug.in/ns/ext/files#AbstractPath</q>, mapped to an integer,
+should be used as the <code>type</code> parameter to a
+LV2_Persist_Store_Function; and will likewise be returned by the corresponding
+call to a LV2_Persist_Retrieve_Function.</p>
+
+<p>Abstract paths reside in a namespace specific to a plugin instance.
+Typical hosts are expected to implement this by giving each plugin instance its
+own state directory.</p>
+
+<p>When storing and retrieving an abstract path, the plugin MUST NOT assume the
+same path will be restored.  However, the restored path will refer to a file
+with equivalent contents to the original.</p>
+""" .