Open Publication Distribution System: Difference between revisions

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{{Short description|Web syndication format}}

{{external links|date=May 2016}}

{{Update|date=June 2025}}

{{Infobox file format

| name = Open Publication Distribution System

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| genre = [[web syndication]]

| released = {{start-date|5 May 2010}}

| latest release version = OPDS 1.12

| latest release date = {{release date and age|df=yes|20112018|0611|2711}}

| containerfor =

| containedby =

| extendedfrom = [[Atom (standard)|Atom]]

| extendedto =

| freeopen = Yes

| url = {{URL|opds.io}} }}

The '''Open Publication Distribution System''' ('''OPDS''') Catalogcatalog format is a [[Web syndication|syndication]] format for [[electronic publication]]s based on [[Atom (standard)|Atom]] and [[HTTP]]. OPDS Catalogscatalogs enable the aggregation, distribution, discovery, and acquisition of electronic publications. OPDS Catalogscatalogs use existing or emergent [[open standard]]s and conventions, with a priority on simplicity.<ref>{{Citation | date = 27 June 2011 | publisher = The Open Internet archive | url = http://opds-spec.org/specs/opds-catalog-1-1-20110627/ | title = OPDS Spec | contribution = OPDS Spec 1.1 | accessdate = 2013-05-07 | type = technical specification}}.</ref>

The Open Publication Distribution System specification is prepared by an informal grouping of partners, combining [[Internet Archive]], [[O'Reilly Media]], [[Feedbooks]], [[One Laptop per Child|OLPC]], and others.

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==History==

OPDS is based on the initial work done by [[Lexcycle]], the company behind [[Lexcycle Stanza|Stanza]],<ref>{{cite mailing list |url=http://groups.google.com/d/topic/openpub/Vr8FI7gIKHg/discussion |title=Project Goals |date=April 9, 2009 |accessdateaccess-date=May 5, 2013 |mailing-list=Open Publication Distribution System |last=Fahlgren |first=Keith |via=[[Google Groups]] }}</ref> an [[E-Book|eBook reader application]] for [[iOS]].{{citation needed|date=December 2017}} All revisions of the specification were produced by an informal group organized around an open mailing list.<ref>{{cite web |url=http://groups.google.com/group/openpub |title=Open Publication Distribution System |website=Google Groups |access-date=May 5, 2013 }}</ref>

{| class="wikitable sortable" align="left"

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! Version !! Date

|-

| {{Version |co |0.9 |sortKey=0.9}}<ref>{{cite web |url=httphttps://specs.opds-spec.org/specsio/opds-catalog-0-.9.html |title=OPDS Catalog 0.9 |website=Open Publication Distribution System: Official Specification & Blog |access-date=May 5, 2013 }}</ref> || {{dts|2010|05|25}}

|-

| {{Version |co |1.0 |sortKey=1.0}}<ref>{{cite web |url=httphttps://specs.opds-spec.org/specsio/opds-catalog-1-.0.html |title=OPDS Catalog 1.0 |website=Open Publication Distribution System: Official Specification & Blog |access-date=May 5, 2013 }}</ref> || {{dts|2010|08|30}}

|-

| {{Version |cco |1.1 |sortKey=1.1}}<ref>{{cite web |url=httphttps://specs.opds-spec.org/specsio/opds-catalog-1-.1.html |title=OPDS Catalog 1.1 |website=Open Publication Distribution System: Official Specification & Blog |access-date=May 5, 2013 }}</ref> || {{dts|2011|06|27}}

|-

| {{Version |pc |1.2 |sortkeysortKey=1.2}}<ref>{{cite web |url=https://codespecs.googleopds.comio/archive/p/openpub/wikis/CatalogSpecDraftopds-1.wiki2 |title=openpubOPDS -Catalog CatalogSpecDraft1.wiki |website=[[Google Code]] Archive2 |access-date=DecemberNovember 411, 20172018 }}</ref> || {{dunnodts|2018|11|11}}

|-

| {{Version |p |2.0 |sortKey=2.0}}<ref>{{cite web |url=https://drafts.opds.io/opds-2.0 |title=OPDS Catalog 2.0 |access-date=November 11, 2018 }}</ref> || {{dunno}}

|- class="sortbottom"

| colspan=2 | {{Version |l |show=001101}}

|}

{{Clear}}

==OPDS clientssoftware==

Many [[e-readers]] or e-book reading applications support importing books from an OPDS catalog. E-book management applications such as [[Calibre (software)|Calibre]] also often include OPDS server software to make an e-book collection available through an OPDS catalog.

==Example of OPDS 1.1 content==

An example of an acquisition feed in OPDS:

<sourcesyntaxhighlight lang="xml"><?xml version="1.0" encoding="UTF-8"?>

<feed xmlns="http://www.w3.org/2005/Atom"

xmlns:dc="http://purl.org/dc/terms/"

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</link>

</entry>

</feed></sourcesyntaxhighlight>

{{Clear}}

==OPDS Catalogscatalogs==

Dozens of OPDS catalogs are available online, and in many different languages.<ref>{{cite web |url=http://wiki.mobileread.com/wiki/OPDS#Online_OPDS_Catalogs |title=Online OPDS Catalogs |publisher=MobileRead Wiki|access-date= |accessdate=2011-05-19}}</ref>

Many users of OPDS also create their own OPDS catalog, as a way to access their ebooks from any device.<ref>{{cite web |url=http://wiki.mobileread.com/wiki/OPDS#OPDS_Catalog_Generation |title=OPDS Catalog Generation |publisher=MobileRead Wiki|access-date= |accessdate=2011-05-19}}</ref>

Developers implementing an OPDS catalog usually use the [[Feedbooks]] catalog<ref>{{cite web |url=http://www.feedbooks.com/catalog.atom |title=Feedbooks OPDS Catalog |publisher=Feedbooks |access-date= |accessdate=2011-05-19}}</ref> as an example of a fully featured catalog. An OPDS validator is also available to test OPDS feeds.<ref>{{cite web |url=https://opds-validator.appspot.com/ |title=OPDS Validator |accessdateaccess-date=2011-05-19}}</ref>

{{Clear}}

==OPDS clients==

Several clients use OPDS, including [[e-book readers]] apps like Android Book Reader<ref>{{cite web|url=https://f-droid.org/en/packages/com.github.axet.bookreader/|title=Book Reader: Simple book reader}}</ref> (fork of the now-proprietary [[FBReader]]).

==See also==

* [[XML]]

== References ==

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== External links ==

'''OPDS standard'''

*[httphttps://specs.opds-spec.org/specsio/opds-catalog-1-1.2 OPDS 1.12] (Current version)

*[https://githubdrafts.com/opds-community/workspace/blob/master.io/opds-1.2.md0 OPDS 12.20] (Draft)

*[https://github.com/opds-community/workspace/blob/master/opds-2.0.md OPDS 2.0] (Draft)

'''OPDS working group links'''

*[https://groups.google.com/group/openpub OPDS Mailing list]

*[https://github.com/opds-community/workspacedrafts/issues OPDS Issue Tracker]

'''Other resources'''

*[http://www.feedbooks.com/api/primer OPDS Primer]

*[http://wiki.mobileread.com/wiki/OPDS MobileRead Wiki - OPDS]

*[http://opdshome.uo1.net/ OPDS Meta-Catalog]

*[https://github.com/search?q=OPDS&type=Repositories&s=stars OPDS projects on GitHub]