guadec-2007
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The document discusses building a unified metadata solution across desktop applications. It outlines issues with current approaches where metadata is siloed within individual apps. The proposed solution includes a metadata store accessed via APIs, tagging as a first-class feature, and a daemon to monitor file changes and notify interested applications and the desktop search tool. Open questions are asked to solicit feedback on the proposed approach.
![Too Many Metas A high level look at building a metadata desktop Joe Shaw [email_address]](https://image.slidesharecdn.com/guadec2007-18722/85/guadec-2007-1-320.jpg)
guadec-2007
- 1. Too Many Metas A high level look at building a metadata desktop Joe Shaw [email_address]
- 2. Overview About me Dashboard Beagle desktop search “Metadata solution” -- what's the problem? A few statements (facts?) about metadata The existing technologies related to metadata The problem of applications siloing their data
- 3. No dissolving of solids in liquids here Solutions in search of problems Letting technologies dictate our behavior instead of use cases and user benefit Good examples of user benefit: Neil J. Patel's Nautilus metadata panels; Leaftag's tagging widgets; Deskbar's searching of tags
- 6. Leaftag and Deskbar From http://raphael.slinckx.net/blog/2006-03-06/deskbar-and-leaftag-last-exit
- 8. 1. “Metadata” is a generic term that covers a vast spectrum of information.
- 9. Much meta makes me mad File size MIME type Custom icons Shutter speed Genre Subject Start time Provides File name Language Tags Bitrate Page number License URLs Extended attributes Layout information Phone number Location Links to other documents
- 10. 2. Metadata is decentralized and can be categorized many different ways.
- 11. The Life and Times of an MP3 Example: No Cars Go.mp3 File size: 8250875 MIME type: audio/mpeg Artist: Arcade Fire Album: Neon Bible Title: No Cars Go Track Number: 10 Duration: 5 minutes, 43 seconds Year: 2007 Bitrate: 192 Tags: Favorite Download URL: http://joeshaw.org/banshee-web/No%20Cars%20Go.mp3
- 12. The Life and Times of an MP3 Example: No Cars Go.mp3 File size: 8250875 MIME type: audio/mpeg Artist: Arcade Fire Album: Neon Bible Title: No Cars Go Track Number: 10 Duration: 5 minutes, 43 seconds Year: 2007 Bitrate: 192 Tags: Favorite Download URL: http://joeshaw.org/banshee-web/No%20Cars%20Go.mp3 Intrinsic to the data Specific to MP3 Externally Stored
- 13. Different Scopes for Different Folks Describing the data File sizes; MIME types Internal to the data type ID3 in MP3; EXIF in JPEG; Subject lines in emails External user-created metadata Tags, emblems, annotations Application-specific Line numbers in Gedit Implicit metadata Implicitly linking related data together
- 14. 3. Metadata of all types already exists and we need to work with it.
- 15. TANSTAAFL (There Ain't No Such Thing As A Free Lunch) There is no single solution to dealing with metadata. You will always need to retrieve and set metadata from different sources. If I change an artist field inside an MP3, it should be written back to the file Existing metadata sources already exist today Example: tags Nautilus (emblems) F-Spot Interoperable with existing software and hardware Exchangeable between devices
- 16. Beagle Focus has been on desktop search; desktop search ≠ metadata store Stores metadata, but largely extracted from the data itself or where it is stored. Searchable metadata Supports many file formats (60+) and data stores (20+) Kick ass design for multiple data sources (files, web pages, emails, chats, etc.) Uses inotify to deal with filesystem changes Not a generic metadata store Presently (pre-0.3.0) weak external metadata story
- 17. Tracker Primarily a metadata store; desktop search secondary Fast, low memory Also uses inotify D-Bus notification of changes to metadata Lacks focus of purpose Basic external metadata like tags Shared data stores for music libraries Epiphany bookmarks with D-Bus notification Small application-specific metadata (line numbers in gedit)
- 18. Leaftag Tagging library, including widgets Good first pass at the problem Lacks a daemon, making tracking of file changes difficult No desktop-wide notification Querying for changes by external applications is very difficult Abandoned Tagging library, including widgets Good first pass at the problem Lacks a daemon, making tracking of file changes difficult No desktop-wide notification Querying for changes by external applications is very difficult Abandoned
- 19. Nautilus Very basic external metadata Emblems (tags with images), notes, icon positions Stored in XML files in ~/.nautilus/metafiles Only deals with files; no emails, web pages, etc. Does not notice external changes, like moving a file outside of Nautilus No APIs for emblems or notes Data is effectively siloed
- 20. Aside: Data Siloing Sucks Data is being kept private to individual apps No (public, supported) way to access Evolution email Incredibly evil hacks in Beagle to get at this data, and still incredibly inefficient No way to access or add Epiphany or Firefox bookmarks No access to Nautilus metdata in other applications No notification of relevant changes Crucial metadata is locked up. Relationships between data are dropped on the floor Email attachments Website downloads APIs to access application data desperately needed
- 21. Ok, now what? D-Bus APIs to break open the silos Richer UIs for metadata presentation Simple metadata store API for apps; get/set, similar to gconf Tagging should be a dedicated, first-order API in our platform Desktop search should be a separate component which indexes and searches metadata store Daemon for tracking changes to files and signaling metadata store and desktop search
- 22. Brave New World Apps D-Bus signals Indexing Crawlers File monitoring daemon Indexer Metadata store Tagging API File System Email Web History
- 25. Unpublished Work of Novell, Inc. All Rights Reserved. This work is an unpublished work and contains confidential, proprietary, and trade secret information of Novell, Inc. Access to this work is restricted to Novell employees who have a need to know to perform tasks within the scope of their assignments. No part of this work may be practiced, performed, copied, distributed, revised, modified, translated, abridged, condensed, expanded, collected, or adapted without the prior written consent of Novell, Inc. Any use or exploitation of this work without authorization could subject the perpetrator to criminal and civil liability. General Disclaimer This document is not to be construed as a promise by any participating company to develop, deliver, or market a product. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. Novell, Inc. makes no representations or warranties with respect to the contents of this document, and specifically disclaims any express or implied warranties of merchantability or fitness for any particular purpose. The development, release, and timing of features or functionality described for Novell products remains at the sole discretion of Novell. Further, Novell, Inc. reserves the right to revise this document and to make changes to its content, at any time, without obligation to notify any person or entity of such revisions or changes. All Novell marks referenced in this presentation are trademarks or registered trademarks of Novell, Inc. in the United States and other countries. All third-party trademarks are the property of their respective owners.
- 26. Color Palette RGB 224 0 0 RED RGB 230 120 20 ORANGE RGB 98 158 31 GREEN RGB 0 166 238 BLUE RGB 60 60 65 RGB 90 90 100 RGB 204 204 205 DK GRAY Note: The gray dotted-line box represents the margins or “working area” into which all text and most graphics and diagrams should conform. How to Add Novell Colors to Your OpenOffice Color Palette: 1. Go to the “ Tools ” menu 2. Select “ Options ” 3. Expand “ OpenOffice.org ” 4. Select “ Colors ” 5. Delete existing colors (one-by-one) 6. Add Novell Colors by giving them a name and entering RGB values 7. Click “ OK ” RGB 50 118 109 TEAL RGB 255 221 0 YELLOW MD GRAY LT GRAY
- 27. Graphics & Typeface Icons/Lines : This presentation refresh simplifies the current template and pushes focus on the content being presented. The icon library will continue to be utilized, but a refresh will be noticeable with the addition of the “Bubble” set of icons, and a subtle color shift. These icons are created to provide a professional, consistent look. When these icons are used sparingly, and in direct relation to the content on the slides, our presentations will communicate and work more effectively. Typeface : Arial has been selected as the new typeface for all Novell communications. The following were considered. 1. Our typeface needs to be designed to carry information quickly to the reader. 2. It needs to be usable for Novell employees in company correspondence and presentations, as well as for outside vendors for marketing and promotion. 3. It needs to easily function on the Linux, Windows and Macintosh platforms. 4. And finally, Arial was created for these exact purposes. Download Icon Library at: http://innerweb.novell.com/brandguide How to Add Novell Icons to OpenOffice Gallery: 1. Go to the “ Tools ” menu 2. Select “ Gallery ” 3. In the Gallery window select “ New Theme... ” 4. With the “ General ” tab active name your new theme (ie.Red flat) 5. Select the “ Files ” tab. 6. Select “ Find Files... ” 7. Find the downloaded folder containing the icons named and click “ Select ” 8. Select “ Add All ” and then “ OK ” 9. Repeat for all icon groups