The Open Publication Distribution System (OPDS) catalog format is a syndication format for electronic publications based on Atom and HTTP. OPDS catalogs enable the aggregation, distribution, discovery, and acquisition of electronic publications. OPDS catalogs use existing or emergent open standards and conventions, with a priority on simplicity.
| Internet media type |
application/atom xml;profile=opds-catalog |
|---|---|
| Initial release | 5 May 2010 |
| Latest release | OPDS 1.2 11 November 2018 |
| Type of format | web syndication |
| Extended from | Atom |
| Open format? | Yes |
| Website | opds |
The Open Publication Distribution System specification is prepared by an informal grouping of partners, combining Internet Archive, O'Reilly Media, Feedbooks, OLPC, and others.
History
editOPDS is based on the initial work done by Lexcycle, the company behind Stanza,[1] an eBook reader application for iOS.[citation needed] All revisions of the specification were produced by an informal group organized around an open mailing list.[2]
| Version | Date |
|---|---|
| 0.9[4] | May 25, 2010 |
| 1.0[5] | August 30, 2010 |
| 1.1[6] | June 27, 2011 |
| 1.2 [7] | November 11, 2018 |
| 2.0[8] | ? |
Old version, still maintained Latest version Future release | |
OPDS software
editMany e-readers or e-book reading applications support importing books from an OPDS catalog. E-book management applications such as Calibre also often include OPDS server software to make an e-book collection available through an OPDS catalog.
Example of OPDS 1.1 content
editAn example of an acquisition feed in OPDS:
<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom"
xmlns:dc="http://purl.org/dc/terms/"
xmlns:opds="http://opds-spec.org/2010/catalog">
<id>urn:uuid:433a5d6a-0b8c-4933-af65-4ca4f02763eb</id>
<link rel="related"
href="/opds-catalogs/vampire.farming.xml"
type="application/atom xml;profile=opds-catalog;kind=acquisition"/>
<link rel="self"
href="/opds-catalogs/unpopular.xml"
type="application/atom xml;profile=opds-catalog;kind=acquisition"/>
<link rel="start"
href="/opds-catalogs/root.xml"
type="application/atom xml;profile=opds-catalog;kind=navigation"/>
<link rel="up"
href="/opds-catalogs/root.xml"
type="application/atom xml;profile=opds-catalog;kind=navigation"/>
<title>Unpopular Publications</title>
<updated>2010-01-10T10:01:11Z</updated>
<author>
<name>Spec Writer</name>
<uri>http://opds-spec.org</uri>
</author>
<entry>
<title>Bob, Son of Bob</title>
<id>urn:uuid:6409a00b-7bf2-405e-826c-3fdff0fd0734</id>
<updated>2010-01-10T10:01:11Z</updated>
<author>
<name>Bob the Recursive</name>
<uri>http://opds-spec.org/authors/1285</uri>
</author>
<dc:language>en</dc:language>
<dc:issued>1917</dc:issued>
<category scheme="http://www.bisg.org/standards/bisac_subject/index.html"
term="FIC020000"
label="FICTION / Men's Adventure"/>
<summary>The story of the son of the Bob and the gallant part he played in
the lives of a man and a woman.</summary>
<link rel="http://opds-spec.org/image"
href="/covers/4561.lrg.png"
type="image/png"/>
<link rel="http://opds-spec.org/image/thumbnail"
href="/covers/4561.thmb.gif"
type="image/gif"/>
<link rel="alternate"
href="/opds-catalogs/entries/4571.complete.xml"
type="application/atom xml;type=entry;profile=opds-catalog"
title="Complete Catalog Entry for Bob, Son of Bob"/>
<link rel="http://opds-spec.org/acquisition"
href="/content/free/4561.epub"
type="application/epub zip"/>
<link rel="http://opds-spec.org/acquisition"
href="/content/free/4561.mobi"
type="application/x-mobipocket-ebook"/>
</entry>
<entry>
<title>Modern Online Philately</title>
<id>urn:uuid:7b595b0c-e15c-4755-bf9a-b7019f5c1dab</id>
<author>
<name>Stampy McGee</name>
<uri>http://opds-spec.org/authors/21285</uri>
</author>
<author>
<name>Alice McGee</name>
<uri>http://opds-spec.org/authors/21284</uri>
</author>
<author>
<name>Harold McGee</name>
<uri>http://opds-spec.org/authors/21283</uri>
</author>
<updated>2010-01-10T10:01:10Z</updated>
<rights>Copyright (c) 2009, Stampy McGee</rights>
<dc:identifier>urn:isbn:978029536341X</dc:identifier>
<dc:publisher>StampMeOnline, Inc.</dc:publisher>
<dc:language>en</dc:language>
<dc:issued>2009-10-01</dc:issued>
<content type="text">The definitive reference for the web-curious
philatelist.</content>
<link rel="http://opds-spec.org/image"
href="/covers/11241.lrg.jpg"
type="image/jpeg"/>
<link rel="http://opds-spec.org/acquisition/buy"
href="/content/buy/11241.epub"
type="application/epub zip">
<opds:price currencycode="USD">18.99</opds:price>
<opds:price currencycode="GBP">11.99</opds:price>
</link>
</entry>
</feed>
OPDS catalogs
editDozens of OPDS catalogs are available online, and in many different languages.[9]
Many users of OPDS also create their own OPDS catalog, as a way to access their ebooks from any device.[10]
Developers implementing an OPDS catalog usually use the Feedbooks catalog[11] as an example of a fully featured catalog. An OPDS validator is also available to test OPDS feeds.[12]
References
edit- ^ Fahlgren, Keith (April 9, 2009). "Project Goals". Open Publication Distribution System (Mailing list). Retrieved May 5, 2013 – via Google Groups.
- ^ "Open Publication Distribution System". Google Groups. Retrieved May 5, 2013.
- ^ "Specifications". Open Publication Distribution System: Official Specification & Blog. Retrieved December 4, 2017.
- ^ "OPDS Catalog 0.9". Retrieved May 5, 2013.
- ^ "OPDS Catalog 1.0". Retrieved May 5, 2013.
- ^ "OPDS Catalog 1.1". Retrieved May 5, 2013.
- ^ "OPDS Catalog 1.2". Retrieved November 11, 2018.
- ^ "OPDS Catalog 2.0". Retrieved November 11, 2018.
- ^ "Online OPDS Catalogs". MobileRead Wiki. Retrieved 2011-05-19.
- ^ "OPDS Catalog Generation". MobileRead Wiki. Retrieved 2011-05-19.
- ^ "Feedbooks OPDS Catalog". Feedbooks. Retrieved 2011-05-19.
- ^ "OPDS Validator". Retrieved 2011-05-19.
External links
editOPDS standard
OPDS working group links
Other resources