OPML .

• OPML

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OPML - Shortcomings

1 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.


OPML - Shortcomings

1 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).


OPML - Shortcomings

1 Exporting your data from an OPML file to another format can't be done

without coding: no free tools are available to convert an OPML file to HTML, and browsers such as Firefox and Internet Explorer cannot display

an OPML file.


OPML - Validation

1 Dave Winer has made a request for comments on a proposal for

validating OPML and released a beta OPML validator.


OPML - Validation

1 Katy Ginger from DLESE has published an XML Schema Document for validating OPML 2.0. There is also

a DTD available for OPML 1.0.


Dave Winer - Share your OPML

1 Winer opened his self-described "commons for sharing outlines,

feeds, and taxonomy" in May 2006. The site allowed users to publish and syndicate blogrolls and aggregator subscriptions using OPML. Winer suspended its service in January

2008.


OPML

1 'OPML' ('Outline Processor Markup Language') is an XML format for Outline (list)|outlines

(defined as a tree, where each node contains a set of named attributes with string values). Originally developed by UserLand Software|

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 feed

aggregator|aggregators.


OPML

1 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.


OPML

1 Support 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.


OPML - XML format

1 The XML elements in an OPML document are:


OPML - XML format

1 ; lt;opml version=1.0gt; : This is the root element. It must contain the

version attribute and one head and one body element.


OPML - XML format

1 An OPML processor may ignore all the head sub-elements


OPML - Shortcomings

1 # 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.


OPML - Shortcomings

1 # 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).


OPML - Validation

1 Dave Winer has made a request for comments on a

[http://www.opml.org/guidelinesForValidation proposal for validating OPML]

and released a beta [http://validator.opml.org/ OPML

validator].


OPML - Validation

1 Katy Ginger from DLESE has published

[http://www.dlese.org/Metadata/opml/2.0/index.htm an XML Schema

Document] for validating OPML 2.0. There is also a

[http://static.userland.com/gems/radiodiscuss/opmlDtd.txt DTD available

for OPML 1.0].


OPML - Example OPML documents

1 *[http://static.userland.com/gems/radiodiscuss/playlist.opml Play

list]https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

OPML - Example OPML documents

1 *[http://radio.weblogs.com/

0001000/gems/publications.opml

Directory]https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

UserLand Software - OPML

1 Outline Processor Markup Language (OPML) is an XML format for outlines.

Originally developed in 2000 as a native file format for Radio

UserLand's outliner application, it has since been adopted for other uses,

the most common being to exchange lists of web feeds between web feed

aggregators.


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OPML .

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