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OPML Files
OPML Files
Published: 2007/06/22
Channel: Chris Pirillo
OPML
OPML
Published: 2016/01/14
Channel: Audiopedia
RSS and OPML for Feed Subscriptions
RSS and OPML for Feed Subscriptions
Published: 2008/03/02
Channel: Chris Pirillo
Using (free) OPML Editor
Using (free) OPML Editor
Published: 2015/09/04
Channel: OutlinesOutloud
How to import OPML, RSS XML data into Flowly
How to import OPML, RSS XML data into Flowly
Published: 2016/09/19
Channel: Flowly Tweets
MyPOD Import OPML demo
MyPOD Import OPML demo
Published: 2014/06/14
Channel: Rob Munro
Downloading and Installing (free) OPML Editor to Use with OutlinesOutloud
Downloading and Installing (free) OPML Editor to Use with OutlinesOutloud
Published: 2015/09/04
Channel: OutlinesOutloud
Tony
Tony's media OPML
Published: 2007/03/31
Channel: mike007pk
OPML export i Google Reader
OPML export i Google Reader
Published: 2007/06/17
Channel: Stefan Svartling
Export OPML from iTunes and import to Podcaster app
Export OPML from iTunes and import to Podcaster app
Published: 2010/07/30
Channel: iPhonePodcaster
Import OPML into FeedReader
Import OPML into FeedReader
Published: 2014/06/25
Channel: I Love Anonymous
Exporting Notes from Sente to Scrivener Using the Export Notes to OPML/RTF Script
Exporting Notes from Sente to Scrivener Using the Export Notes to OPML/RTF Script
Published: 2013/11/26
Channel: Dana Leighton
How to Export Your Google Reader RSS OPML XML File
How to Export Your Google Reader RSS OPML XML File
Published: 2013/07/01
Channel: Chris Abraham
OPML DUET2016
OPML DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/06/16
Channel: OPML jed Vergara
PlayOn Podcasts OPML Tutorial
PlayOn Podcasts OPML Tutorial
Published: 2009/08/12
Channel: Amerisun Gaming and Tech
QuickPlan for Mac - OPML integration
QuickPlan for Mac - OPML integration
Published: 2016/02/03
Channel: Mobilinked
How to create a custom OPML xml file
How to create a custom OPML xml file
Published: 2013/07/06
Channel: Eddie Chovgan
[Video] Guide to create a new OPML feed
[Video] Guide to create a new OPML feed
Published: 2009/08/14
Channel: stephenvevansii
OPML DUET2016
OPML DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/07/01
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
OPMl duet2016
OPMl duet2016
Published: 2016/10/11
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/08/03
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
Using Google Reader: Importing OPML Subscriptions
Using Google Reader: Importing OPML Subscriptions
Published: 2012/06/03
Channel: Alan Levine
How to Add Blog Subscriptions to Microsoft Outlook 2010 (via OPML file)
How to Add Blog Subscriptions to Microsoft Outlook 2010 (via OPML file)
Published: 2010/12/01
Channel: Stephen Francoeur
OPML DUET2016
OPML DUET2016
Published: 2016/07/01
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/08/03
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/11/08
Channel: OPML jed Vergara
How to export opml file from feedly
How to export opml file from feedly
Published: 2013/10/08
Channel: Ashwani Srivastava
tutorial importar archivo OPML a hootsuite
tutorial importar archivo OPML a hootsuite
Published: 2016/10/03
Channel: Loles Sancho
OPML DUET2016
OPML DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/07/12
Channel: Lanie Bigay
OPML DUET2016
OPML DUET2016
Published: 2016/07/12
Channel: Lanie Bigay
Agregar archivo OPML a una aplicacion RSS de Windows Mobile , Windows 7
Agregar archivo OPML a una aplicacion RSS de Windows Mobile , Windows 7
Published: 2010/12/22
Channel: Israel Diaz
Kurasie: Importing an OPML File From Feedly
Kurasie: Importing an OPML File From Feedly
Published: 2014/01/20
Channel: Kurasie
How to import an OPML file in Mobispine
How to import an OPML file in Mobispine
Published: 2007/06/16
Channel: Stefan Svartling
opml.mp4
opml.mp4
Published: 2011/01/16
Channel: x28de
OPML. DUET2016
OPML. DUET2016
Published: 2016/06/12
Channel: OPML jed Vergara
OPML DUET2016
OPML DUET2016
Published: 2016/07/02
Channel: OPML jed Vergara
Managing your YouTube Subscriptions with RSS!
Managing your YouTube Subscriptions with RSS!
Published: 2016/02/10
Channel: Jordan Keyes
Switching RSS readers via OPML
Switching RSS readers via OPML
Published: 2013/08/26
Channel: The Internet Hive
OPML DUET2016
OPML DUET2016
Published: 2016/07/01
Channel: OPML jed Vergara
Plugin De Report OPML MCPE -Plugin de Reportar MCPE Todas VS
Plugin De Report OPML MCPE -Plugin de Reportar MCPE Todas VS
Published: 2017/11/05
Channel: SpanClear MCPE
Roblox OPML l How to Get the Monster Class
Roblox OPML l How to Get the Monster Class
Published: 2017/04/30
Channel: Pikamon - Mon
Demo OWL to OPML
Demo OWL to OPML
Published: 2016/10/27
Channel: The-Loc NGUYEN
Rocking with River4: Lesson 6 - Using Fargo to Create OPML Files for River4
Rocking with River4: Lesson 6 - Using Fargo to Create OPML Files for River4
Published: 2015/08/08
Channel: Rocking With River4
OPML import i Mobispine
OPML import i Mobispine
Published: 2007/06/17
Channel: Stefan Svartling
My experience trying River2 / OPML Editor
My experience trying River2 / OPML Editor
Published: 2012/11/12
Channel: Newman Lanier
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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OPML
Opml-icon.svg
Filename extension .opml
Internet media type application/xml, text/xml, text/x-opml
Developed by UserLand
Type of format Outline
Extended from XML
Website dev.opml.org

OPML (Outline Processor Markup Language) is an XML format for outlines (defined as "a tree, where each node contains a set of named attributes with string values"[1]). Originally developed by UserLand as a native file format for the outliner application in its Radio UserLand product, it has since been adopted for other uses, the most common being to exchange lists of web feeds between web feed aggregators.

The OPML specification defines an outline as a hierarchical, ordered list of arbitrary elements. The specification is fairly open which makes it suitable for many types of list data.

Support[clarification needed] for OPML is available in Mozilla Thunderbird, and many other RSS reader web sites and applications can both import and export OPML files of subscriptions.

XML format[edit]

The XML elements in an OPML document are:

<opml version="1.0">
This is the root element. It must contain the version attribute and one head and one body element.
<head>
Contains metadata. May include any of these optional elements: title, dateCreated, dateModified, ownerName, ownerEmail, expansionState, vertScrollState, windowTop, windowLeft, windowBottom, windowRight. Each element is a simple text element. dateCreated and dateModified contents conform to the date-time format specified in RFC 822. expansionState contains a comma-separated list of line numbers that should be expanded on display. The windowXXX elements define the position and size of the display window. An OPML processor may ignore all the head sub-elements. If the outline is opened inside another outline then the processor must ignore the window elements.
<body>
Contains the content of the outline. Must have at least one outline element.
<outline>
Represents a line in the outline. May contain any number of arbitrary attributes. Common attributes include text and type. The outline element may contain any number of outline sub-elements.

Criticism[edit]

  1. The RFC 822 date format is considered obsolete, and amongst other things permits the representation of years as two digits. (RFC 822 has been superseded by RFC 2822 then RFC 5322.) In general, date and time formats should be represented according to RFC 3339.
  2. Due to the semantics of the "expansionState" attribute:
    • The expansion state of the children of collapsed nodes cannot be stored
    • When an outline element is expanded, collapsed, added, deleted or moved, the expansion state of all elements below it must be recalculated
  3. Due to the arbitrary nature of the "type" attribute, and the acceptance of arbitrary attributes on "outline" elements, interoperability of OPML documents relies almost entirely on the undocumented conventions of content producers.
  4. MIME types aren't clear; text/xml usually merely identifies the document as having XML content, while text/x-opml does not specify that the document is XML since it lacks the +xml suffix (see XML and MIME).

Validation[edit]

Dave Winer[clarification needed] has made a request for comments on a proposal for validating OPML and released a beta OPML validator.

Katy Ginger[clarification needed] from DLESE[clarification needed] has published an XML Schema Document for validating OPML 2.0. There is also a DTD available for OPML 1.0.

Example OPML documents[edit]

Alternative specifications[edit]

Alternative specifications have been proposed, notably these include OML, XOXO and XBEL.

  • OML
  • XOXO – Extensible Open XHTML Outlines
  • XBEL – XML Bookmark Exchange Language

See also[edit]

  • DataPortability
  • APML – Attention Profiling Mark-up Language
  • Feed icon
  • Share icon
  • Applications which use OPML
    • Many mind mapping applications

References[edit]

  1. ^ "OPML 2.0 Specification". Retrieved 18 March 2014. 

External links[edit]

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