File Type Outline Processor Markup Language File IconOutline Processor Markup Language File
File Format Standard (developed by The Omni Group)
Usage Runs when opened
Popularity ★ ★ ★ ★ ☆  Common

Outline document written in OPML (Outline Processor Markup Language); used to exchange lists of Web feeds (such as .RSS files) between Web feed aggregators; also used for other general outlining purposes.

Each OPML file contains the following XML elements:

  1. OPML version - e.g. "1.0"
  2. Head - contains metadata that describes the content
  3. Body - contains the content of the outline
  4. Outline - contains a line in the outline

Open With

IconCS Odessa ConceptDraw MINDMAP

IconCorel MindManager

IconOPML Editor


IconThe Omni Group OmniOutliner

IconCS Odessa ConceptDraw MINDMAP

IconCorel MindManager

Updated 2007
Information from the PC File Extensions Reference