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OPML: Products, Criticism & Alternative specifications

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"). Originally developed by UserLand Software 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…

Language: English [EN]
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OPML topic overview

The analysis highlights Products, Criticism and Alternative specifications as prominent areas in the source structure around OPML.

Related topics
20
Source areas
5
Connected nodes
25
Extracted relationships
33
Concept neighborhoods
21
Bridge connections
25

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 9 topics
Criticism · 5 topics
Alternative specifications · 3 topics
XML format · 2 topics
Validation · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Developed by
UserLand
Extended from
XML
Internet media type
application/xml, text/xml, text/x-opml
Type of format
Outliner
Uniform Type Identifier (UTI)
org.opml.opml
UTI conformation
public.xml

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

XML format

Criticism

Validation

Alternative specifications

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How OPML connects Entity context

The extracted context around OPML shows recurring relationship patterns in the source. For example, OPML → CEO, Dave Winer, DLESE, DTD, Earth System Education, He, November, The Harvard Digital Library, There, Userland, XML Schema Document Another extracted example is OPML → Due, In, MIME, RFC, The, The RFC, XML. Use these groups to spot repeated connection types before inspecting the individual relationships.

OPML

Top relations

related to Validation · 11
OPML → CEO, Dave Winer, DLESE, DTD, Earth System Education, He, November, The Harvard Digital Library, There, Userland, XML Schema Document
related to Criticism · 7
OPML → Due, In, MIME, RFC, The, The RFC, XML
related to External links · 6
OPML → Icon Files Archived, June, Specification, SpecificationOPML Editor, Wayback Machine, Wayback MachineOPML Viewer-EditorOPML Viewer
Developed by · 1
OPML → UserLand
Extended from · 1
OPML → XML
Filename extension · 1
OPML → .mw-parser-output .monospaced{font-family:monospace,monospace} .opml
Internet media type · 1
OPML → application/xml, text/xml, text/x-opml
Type of format · 1
OPML → Outliner
Uniform Type Identifier (UTI) · 1
OPML → org.opml.opml
UTI conformation · 1
OPML → public.xml

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

format xml outline feed specification userland outliner elements lists web list rfc developed application outlines document markup language attributes since

OPML relationships Subject–Predicate–Object triples

TTTA extracted 33 structured relationships around OPML. Examples in this analysis include OPML → Developed by → UserLand and OPML → Extended from → XML. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
OPMLDeveloped byUserLand1.00infobox
OPMLExtended fromXML1.00infobox
OPMLFilename extension.mw-parser-output .monospaced{font-family:monospace,monospace} .opml1.00infobox
OPMLInternet media typeapplication/xml, text/xml, text/x-opml1.00infobox
OPMLType of formatOutliner1.00infobox
OPMLUniform Type Identifier (UTI)org.opml.opml1.00infobox
OPMLUTI conformationpublic.xml1.00infobox
OPMLWebsitedev.opml.org1.00infobox
OPMLrelated to CriticismThe RFC0.60section
OPMLrelated to CriticismRFC0.60section
OPMLrelated to CriticismIn0.60section
OPMLrelated to CriticismDue0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around OPML bring nearby vocabulary together. In this analysis, examples include Outline, Xml and Elements. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • OPML
    • Outline
    • Xml
    • Elements
    • Format
    • Also
    • Arbitrary
    • Attributes
    • Available
    • Language
    • Markup
    • Outlines
    • Type
  • opml
    • Outline
    • Xml
    • Elements
    • Format
    • Also
    • Arbitrary
    • Attributes
    • Available
    • Language
    • Markup
    • Outlines
    • Type
  • xml format
    • Application
    • Developed
    • Lists
    • Outliner
    • Web
    • Feed
    • Userland
    • Xml
    • Opml
    • Rss
    • Also
    • Alternative
  • feed aggregators
    • Lists
    • Web
    • Format
    • Rss
    • Available
    • Data
    • Language
    • Markup
    • Oml
    • Open
    • Outliner
    • Outlines
  • alternative specifications
    • Specifications
    • Also
    • Application
    • Date
    • Developed
    • Oml
    • Outliner
    • Text
    • Type
    • X-opml
    • Xbel
    • Xoxo
  • outliner
    • Userland
    • Also
    • Alternative
    • Date
    • Exchange
    • Lists
    • Since
    • Specifications
    • Text
    • Type
    • Web
    • X-opml
  • xoxo
    • Oml
    • Xbel
    • Alternative
    • Data
    • Exchange
    • Language
    • Markup
    • Open
    • Outlines
    • Specifications
    • Feed
    • Specification
  • userland software
    • Also
    • Alternative
    • Date
    • Specifications
    • Text
    • Type
    • Web
    • X-opml
    • Document
    • Elements
    • Feed
    • Rfc

Connections between topic areas Semantic bridges

For OPML, one of the stronger structural bridges in this analysis connects OPML with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
OPML — Overview · splits 16 ⟂ 10
OPML — Criticism · splits 20 ⟂ 6
OPML — Alternative specifications · splits 22 ⟂ 4
OPML — XML format · splits 23 ⟂ 3

Map overview Semantic statistics

OPML

Nodes26
Edges25
Triples33
Avg. degree1.92
Density0.076923
Components1

Source & methodology

TTTA analyzes the structure around OPML to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Products, Criticism & Alternative specifications, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — OPML · EN edition · Analysis: TopicsToTalkAbout

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