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author | David Robillard <d@drobilla.net> | 2011-11-20 23:08:57 +0000 |
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committer | David Robillard <d@drobilla.net> | 2011-11-20 23:08:57 +0000 |
commit | 725d4a404b838da6b67d9da66228a1125bddef57 (patch) | |
tree | a1daab3d767c85b1b67ff3a9eb60d54721b2e5fc /ns/ext/files/files.ttl | |
parent | 5ae0165d6d0420e95e22c1451e319b9e83398c28 (diff) | |
download | lv2-725d4a404b838da6b67d9da66228a1125bddef57.tar.xz |
Lay out repository structure to match include and URI structure.
Treat lv2core like all the other specifications in gendoc.py.
Diffstat (limited to 'ns/ext/files/files.ttl')
-rw-r--r-- | ns/ext/files/files.ttl | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/ns/ext/files/files.ttl b/ns/ext/files/files.ttl new file mode 100644 index 0000000..d3ff8a5 --- /dev/null +++ b/ns/ext/files/files.ttl @@ -0,0 +1,115 @@ +# 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> +""" . |