Dia (software)

Dia (/ˈdiːə/)[3] is free and open source general-purpose diagramming software, developed originally by Alexander Larsson. Dia uses a controlled single document interface (SDI) similar to GIMP and Inkscape.

Dia
Dia 0.97 in Norwegian on Windows Vista
Original author(s)Alexander Larsson
Developer(s)Dia developers
Initial release31 August 1998 (31 August 1998)[1]
Preview release
0.97.3[2] / September 5, 2014 (2014-09-05)
Repositorygitlab.gnome.org/GNOME/dia/ (upstream), github.com/GNOME/dia (mirror)
Written inC
Operating systemWindows, OS X, Linux, Unix
TypeDiagramming software
LicenseGPL
WebsiteGNOME Apps

Features

Dia has a modular design with several shape packages available for different needs: flowchart, network diagrams, circuit diagrams, and more. It does not restrict symbols and connectors from various categories from being placed together.

Dia has special objects to help draw entity-relationship models (obsoleted tedia2sql or newer parsediasql can be used to create the SQL DDL), Unified Modeling Language (UML) diagrams, flowcharts, network diagrams, and simple electrical circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of Scalable Vector Graphics (SVG) to draw the shape.

Dia loads and saves diagrams in a custom XML format which is, by default, gzipped to save space. It can print large diagrams spanning multiple pages[4] and can also be scripted using the Python programming language.

Exports

Dia can export diagrams to various formats including the following:

  • EPS (Encapsulated PostScript)
  • SVG (Scalable Vector Graphics)
  • DXF (Autocad's Drawing Interchange format)
  • CGM (Computer Graphics Metafile, defined by ISO standard 8632)
  • WMF (Windows Meta File)
  • PNG (Portable Network Graphics)
  • JPEG (Joint Photographic Experts Group)
  • VDX (Microsoft's XML for Visio Drawing)

Development

Dia was originally created by Alexander Larsson but he moved on to work on GNOME and other projects. James Henstridge then took over as the lead developer, but he also moved on to other projects. He was followed by Cyrille Chepelov and Lars Ræder Clausen in turn.

Dia is maintained by a group of developers: Hans Breuer, Steffen Macke, and Sameer Sahasrabuddhe.

Dia is written in C, and has an extension system, which also supports writing extensions in Python.

gollark: I like how crates.io has an excellent collection of highly optimized algorithms for things which I will inevitably use in a ridiculously slow way by accident.
gollark: I'm unsure of exactly where to put the term frequency data, which is important for ranking, or how to rank based on word nearness whatsoever.
gollark: I found an efficient and fairly low-storage way to store some of the inverted index data (specifically "does this term occur or not").
gollark: Maybe it could index conespace too.
gollark: I continue investigation into an improved osmarksßsearch engine.

See also

References
  1. Larsson, Alexander. GitLab Dia Repository https://gitlab.gnome.org/GNOME/dia/-/commit/fd25f1de0960429ed2ce19d3df6e2b9854bfa0df. Retrieved 2 August 2020. Missing or empty |title= (help)
  2. http://ftp.gnome.org/pub/gnome/sources/dia/0.97/dia-0.97.3.news
  3. "Dia Frequently Asked Questions". Retrieved 2008-08-12.
  4. "Dia". ohloh. Geeknet, Inc. Retrieved 2010-05-30.
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