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VIATHINKSOFT/WEBFAN                                         D. Marschall
SPECIFICATION No. 9                                         ViaThinkSoft
First Draft: 2020                                      11 September 2024


                  === File Format Definition File ===

Abstract

   This document describes a file format that describes detection of
   file formats, e.g. by filename extension.

Identification of this Document

   Revision:  2024-09-11
   State:     In Force
   Filename:  viathinksoft-std-0009-fileformat-def.txt
   URN:       urn:x-viathinksoft:std:0009:2024-09-11
   OID:       1.3.6.1.4.1.37476.3.1.7
              { iso(1) identified-organization(3) dod(6) internet(1)
                private(4) enterprise(1) 37476 specifications(3)
                fileformat(1) fileformat(7) }
   WEID:      weid:pen:SX0-3-1-7-9
   IETF/RFC:  (None)

Attachments

   Reference implementation in PHP: https://misc.daniel-
   marschall.de/code/php/fileformats/

Copyright Notice

   Copyright (c) 2020-2024 ViaThinkSoft and the persons identified as
   the document authors.  All rights reserved.

   Licensed under the terms of the Apache 2.0 License.















Marschall                                                       [Page 1]
VTS/WF STD. 9 File Format Definition File 11 September 2024 Table of Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 3 2 File Structure / Example . . . . . . . . . . . . . . . . . . . 3 3 Security Considerations . . . . . . . . . . . . . . . . . . . . 4 4 RA Considerations . . . . . . . . . . . . . . . . . . . . . . . 4 5 References . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.1 Normative References . . . . . . . . . . . . . . . . . . . 4 5.2 Informative References . . . . . . . . . . . . . . . . . . 4 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5 Marschall [Page 2]
VTS/WF STD. 9 File Format Definition File 11 September 2024

1 Introduction

This document describes a file format that describes detection of file formats, e.g. by filename extension.

1.1 Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

2 File Structure / Example

[1.3.6.1.4.1.37476.3.1.7.1] Title = File Format Descriptions Author = Daniel Marschall, ViaThinkSoft Version = 2023-08-31 Language = en-US License = Apache License, Version 2.0 ; This is a comment line [Static] ; This is the string that will be displayed when no file type has ; been detected. LngUnknown = Unknown [OidHeader] ; Files identified via OID (OID written inside square brackets of the ; first line of a file), e.g. [2.999] 1.3.6.1.4.1.37476.3.1.5.1 = ViaThinkSoft OID Illegality Rules File V1 1.3.6.1.4.1.37476.3.1.5.2 = ViaThinkSoft OID Illegality Rules File V2 [GuidHeader] ; e.g. [00000000-0000-0000-0000-000000000000] ; Files identified via GUID (GUID written inside square brackets of ; the first line of a file, without curly brackets and lowercase) 00000000-0000-0000-0000-000000000000 = Null File [MimeType] ; Files identified via MIME type application/css = CSS Stylesheet application/epub+zip = Electronic publication (EPUB) application/gzip = GZip Compressed Archive application/java-archive = Java Archive (JAR) Marschall [Page 3]
VTS/WF STD. 9 File Format Definition File 11 September 2024 [FileExtension] ; Files identified via an case-insensitive filename extension 3G2 = 3GPP2 multimedia file 3GP = 3GPP multimedia file 7Z = 7-Zip Compressed File

3 Security Considerations

None

4 RA Considerations

OID: 1.3.6.1.4.1.37476.3.1.7 WEID: weid:pen:SX0-3-1-7-9 ASN1: { iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 37476 specifications(3) fileformat(1) fileformat(7) } IRI: /.../Specifications/FileFormat/FileFormats Children: + v1(1), IRI Version1

5 References

5.1 Normative References

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, <https://www.rfc-editor.org/info/rfc2119>.

5.2 Informative References

None Marschall [Page 4]
VTS/WF STD. 9 File Format Definition File 11 September 2024 Acknowledgements I would like to thank Melanie Wehowski for her long time support in OIDplus and WEID projects. This document was written in Nroff Internet Draft Editor by 3xA Security. https://aaa-sec.com/nroffedit/ https://misc.daniel-marschall.de/patches/nroffedit/ ("year 2020" patch) Authors' Addresses Daniel Marschall Postfach 11 53 69243 Bammental Germany Email: daniel-marschall@viathinksoft.de URI: https://www.viathinksoft.com/ Marschall [Page 5]