Visual Boy Advance saved state
File type: Game file
An sgm file is related to the Visual Boy Advance an emulator of Nintendo Gameboy Advance. An sgm file stores saved progress in the game.
Found 4 different file type records with the same sgm filename suffix.
File type category:
Game file
Date updated: September 4, 2019
The sgm file extension is associated with Visual Boy Advance, one of several emulators to emulate the Nintendo Gameboy Advance handheld console.
The sgm file contains saved state of game (save).
Use Visual Boy Advance to open *.sgm saved state files.
Probably cannot be converted to anything else.
Software applications that can open sgm files:
Microsoft Windows
Software apps that create sgm files:
Microsoft Windows
Software applications that handle other tasks involving sgm files:
Microsoft Windows
File type category:
Document file
Date updated: October 2, 2026
The EAD DTD was designed for use with both SGML and XML. It defines elements for describing archival collections, their contents, provenance, arrangement, access conditions and related information.
The DTD conforms to SGML/XML (ISO 8879) specifications and has been tested with a wide range of SGML and XML software. It includes switches for disabling features used only in SGML applications and enabling features required for XML applications. Instructions for using these switches are included in the DTD itself.
An SGM file is normally part of an archival description workflow and may be accompanied by the EAD DTD, entity files, stylesheets or other supporting files. It is a platform-independent text document, but software support depends on whether the application handles the relevant SGML or XML version of EAD. Older SGML-based EAD documents remain in archival collections, while newer workflows generally use XML.
Obtaining the EAD DTD and related files alone may not be sufficient to use them with SGML or XML authoring software. Applications may require additional configuration, proprietary features or add-ons, so consult the relevant software manuals or user guides.
Open an SGM file with an SGML-aware authoring or archival description application that supports EAD. An XML editor may open the text, but it might not validate an SGML EAD document correctly.
A plain-text editor can display the markup for inspection, although it will not provide EAD validation or a formatted archival description. If the file uses an external EAD DTD or entity files, keep those files available in their expected locations.
An EAD-aware archival or SGML/XML application may export or transform an archival description into another EAD serialization, such as XML, when the required DTDs and supporting files are available.
Preserve the original SGM file and its associated DTD, entities and stylesheets when converting, and verify the result in an EAD-aware application.
File type category:
Document file
Date updated: October 2, 2026
Standard Generalized Markup Language (ISO 8879:1986, SGML) is an ISO-standard metalanguage for defining markup languages. An SGM file in this context contains SGML source for an IETF document.
SGML is descended from IBM's Generalized Markup Language (GML), developed in the 1960s by Charles Goldfarb, Edward Mosher, and Raymond Lorie. SGML provides an abstract syntax that can be implemented through different concrete syntaxes.
Angle brackets are commonly used as tag delimiters in SGML, following the reference concrete syntax, but a document's SGML declaration can define other delimiters. An SGML interpreter can therefore parse markup such as GML when the appropriate declaration and document rules are available.
Commonly reported MIME types include text/sgml, text/x-sgml, application/sgml, and application/x-sgml. SGML is an established, largely legacy format, although some archival and standards documents still require SGML-aware tools.
An SGM file is normally plain text, so it can be viewed in any text editor. To interpret its markup as an IETF document, open it with an SGML-aware parser or editor and provide the DTD, SGML declaration, and external entity files referenced by the document when required.
A basic text editor may display the source but will not validate or render the document. The result can therefore look incomplete if the file depends on resources that are not included with it.
SGM files can be converted to HTML, XML, or another document format with an SGML-aware processing tool when the document's DTD, SGML declaration, and referenced entities are available. The conversion rules depend on the specific IETF document type.
There is no reliable extension-only conversion. If the required SGML declarations or supporting files are missing, preserving the original SGM file is usually preferable to attempting an automatic conversion.
File type category:
Document file
Date updated: May 29, 2019
The sgm file extension is also associated with the XMetaL, a specialized XML editor for structured authoring from JustSystems available for Microsoft Windows.
Most likely it is the programs default file format.
Use XMetaL to open *.sgm files.
Probably cannot be converted to anything else.
Software applications that can open sgm files:
Microsoft Windows
Software applications that can edit sgm files:
Microsoft Windows
Software capable of saving sgm files:
Microsoft Windows
Software apps that create sgm files:
Microsoft Windows
Software applications that handle other tasks involving sgm files:
Microsoft Windows
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