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Okular: History, Art & Measurement

Okular is a free cross-platform document viewer developed by the KDE community based on the Qt and KDE Frameworks libraries. It is distributed as part of the KDE Applications bundle. It replaced KPDF, its main predecessor, alongside KGhostView, KFax, KFaxview and KDVI in KDE 4. Its functionality can be embedded in other applications.

Language: English [EN]
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Okular topic overview

The analysis highlights History, Art and Measurement as prominent areas in the source structure around Okular.

Related topics
35
Source areas
4
Connected nodes
39
Extracted relationships
32
Concept neighborhoods
20
Bridge connections
39

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.

Features · 23 topics
Overview · 7 topics
History · 4 topics
Okular for Windows · 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.

Developer
KDE
License
GPL-2.0-only or GPL-3.0-only
Operating system
Linux and Windows
Original author
Piotr Szymański
Release
2005; 21 years ago (2005)
Repository
invent.kde.org/graphics/okular

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

History

Okular for Windows

Features

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 Okular connects Entity context

The extracted context around Okular shows recurring relationship patterns in the source. For example, Okular → Alongside, Annotations, Jovie, Okular's, Other, PDF, Poppler, Qt, Qt Speech Another extracted example is Okular → Code, December, Google Summer, In, Piotr Szymański, Qt, Season, Usability, When. Use these groups to spot repeated connection types before inspecting the individual relationships.

Okular

Top relations

related to Features · 9
Okular → Alongside, Annotations, Jovie, Okular's, Other, PDF, Poppler, Qt, Qt Speech
related to history · 9
Okular → Code, December, Google Summer, In, Piotr Szymański, Qt, Season, Usability, When
related to Okular for Windows · 2
Okular → Microsoft Store As, Windows
Developer · 1
Okular → KDE
License · 1
Okular → GPL-2.0-only or GPL-3.0-only
Operating system · 1
Okular → Linux and Windows
Original author · 1
Okular → Piotr Szymański
Release · 1
Okular → 2005; 21 years ago (2005)
Repository · 1
Okular → invent.kde.org/graphics/okular
Stable release · 1
Okular → 26.04.0 / 9 April 2026; 4 months ago (9 April 2026)

Important terminology

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

Important terminology

kde pdf document file windows qt viewer version applications features website free since software text based part alongside formats also

Okular relationships Subject–Predicate–Object triples

TTTA extracted 32 structured relationships around Okular. Examples in this analysis include Okular → Developer → KDE and Okular → License → GPL-2.0-only or GPL-3.0-only. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
OkularDeveloperKDE1.00infobox
OkularLicenseGPL-2.0-only or GPL-3.0-only1.00infobox
OkularOperating systemLinux and Windows1.00infobox
OkularOriginal authorPiotr Szymański1.00infobox
OkularRelease2005; 21 years ago (2005)1.00infobox
OkularRepositoryinvent.kde.org/graphics/okular1.00infobox
OkularStable release26.04.0 / 9 April 2026; 4 months ago (9 April 2026)1.00infobox
OkularTypeUniversal document viewer1.00infobox
OkularWebsiteokular.kde.org1.00infobox
OkularWritten inC++1.00infobox
Okularis afree cross-platform document viewer developed by the KDE community based on the Qt and KDE Frameworks libraries0.90text
Okularrelated to External linksOfficial0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around Okular bring nearby vocabulary together. In this analysis, examples include Viewer, Website and Windows. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Okular
    • Viewer
    • Website
    • Windows
    • Pdf
    • Also
    • Available
    • Based
    • Season
    • Store
    • Features
    • Software
    • Kde
  • okular
    • Viewer
    • Website
    • Windows
    • Pdf
    • Also
    • Available
    • Based
    • Season
    • Store
    • Features
    • Software
    • Kde
  • document viewer
    • File
    • Website
    • Based
    • Formats
    • Poppler
    • Pdf
    • Viewer
    • Okular
    • Kde
    • Version
    • Official
    • Developed
  • portable document format
    • File
    • Based
    • Formats
    • Poppler
    • Pdf
    • Viewer
    • Okular
    • Kde
    • Version
    • Developed
    • Piotr
    • Szymański
  • tag image file format
    • Pdf
    • Formats
    • Poppler
    • Printing
    • Since
    • Text
    • Version
    • Piotr
    • Szymański
    • Also
    • Documents
    • Drm
  • device independent file format
    • Pdf
    • Formats
    • Poppler
    • Printing
    • Since
    • Text
    • Version
    • Piotr
    • Szymański
    • Also
    • Documents
    • Drm
  • okular for windows
    • Also
    • Available
    • Store
    • Features
    • Website
    • Okular
    • Viewer
    • Windows
    • Piotr
    • Szymański
    • Pdf
    • Based
  • features
    • Also
    • Documents
    • Include
    • Pdf
    • Website
    • Windows
    • File
    • Piotr
    • Szymański
    • Available
    • Formats
    • May

Connections between topic areas Semantic bridges

For Okular, one of the stronger structural bridges in this analysis connects Okular with Features. 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
Okular — Features · splits 16 ⟂ 24
Okular — Overview · splits 32 ⟂ 8
Okular — History · splits 35 ⟂ 5

Map overview Semantic statistics

Okular

Nodes40
Edges39
Triples32
Avg. degree1.95
Density0.05
Components1

Source & methodology

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

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

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