Media Types for Microsoft Image Formats

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Media Type Registrations for Microsoft-Inspired Image Formats image/wmf, image/emf image/bmp, (and maybe others) IETF 91 APPSAWG Honolulu, HI, USA, 2014-11-10 Sean Leonard <[email protected]> Penango, Inc. Overview • draft-seantek-image-wmf-emf-00 • draft-seantek-image-bmp-00 • New Media Type Registrations • Informational RFCs • Seeking comments and discussion About Windows Metafiles (and Enhanced Metafiles) • From Windows 3.0, the Before Time™ • De-facto industry standards for vector and raster graphics • Widely implemented • Required for interoperability in other standards, e.g., Office Open XML, which use media types • image/x-wmf, image/x-emf in wide use • Documented with MS Open Specification Promise About Windows Bitmaps • From Windows 2.0, the Way Before Time™ • De-facto industry standards for raster graphics • Widely implemented • Required for interoperability in other standards, e.g., Office Open XML, which use media types • image/x-bmp in wide use • Documented with MS Open Specification Promise • Basis for other widely implemented formats: Windows Cursors (.cur), Windows Animated Cursors (.ani), Windows Icons (.ico) Example Why Not vnd. Facet? • Let’s be realistic • Short and sweet Why Now? • MIME Sniffing “Living Standard” • Content sniffing = dangerous • Well-documented • Short and sweet registrations (8 pages, 5 pages) • Historical interest and preservation • Felt like it Should We Do Other Raster Formats? • Windows Cursors: .cur, image/cur • Windows Animated Cursors: .ani, image/ani or video/ani? • Novel classification issue • Actually based on Resource Interchange File Format (RIFF), same as AVI and WebP • Windows Icons: .ico, image/ico • Existing image/vnd.microsoft.icon…pretty much nobody uses this (true statement?) • Apache 2.2.x and trunk still serve as image/x-icon Comments and discussion welcome! .

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