📌 .SMF standard concerns the mathematical formulas generated by OpenOffice Math and other corresponding variants of an open office suite, like LibreOffice Math, for instance. As it is accustomed, .SMF container maintains the formatting and syntax of a mathematical expression or equation. In recent years the .SMF specification has been entirely consumed by more contemporary and flexible .ODF format structure. However, the .SMF container is still taking part and involved in the operations executed by Apache OpenOffice program solution for the identical purposes and targets.
📌 Another variant of .SMF specification can be defined as a formal audio (i.e., MIDI) container, invented and copyrighted by MIDI Manufacturers Association. On its internal hierarchy and layout, the .SMF extension composition is nearly completely identical to a .MID standard. Therefore, it is processed, opened and manipulated in the same way, offering a chance to playback plain MIDI audio-content and samples. In former decades the .MIDI container served as a predecessor of .MP3 audio-standard, with proper restrictions in quantity of available channels and bitrate.
📌 .SMF file variant can also belong to the vector graphical images made up with dedication to the Serif Metafile data standard, a proprietary mechanism which serves to widen the Windows Metafile (WMF) logic to embed improved text, fill and line definitions. The .SMF methodology is applied to share and transmit vector graphics across various diverse Serif program solutions, like PagePlus and DrawPlus, for instance. In late 2010’s the development and maintenance of both suites were terminated and discontinued, offering a prospective road to enhanced Affinity Publisher platform.
📌 This .SMF extension schema concerns the project files built up by SkinMagic Toolkit, a developer application utilized for the creation of the program interface skins in the form of .SMF entries. In an accustomed workflow, the .SMF resources may be composed of bitmap graphics and user interface dialogs which are applied for overlaying visual components (borders, panels, menus, buttons, text boxes, radio buttons, etc.) of the graphical app UI. .SMF file instances are usually created by a program bundle entitled as SkinMagicBuilder, which is integrated into the SkinMagic Toolkit installation routine.
How to open an .SMF file?
📌 Considering the fact that the .SMF structure can rely on textual, vector or audio foundation, various tools can be used in order to open, explore and comprehend the .SMF container in real working clauses. After the .SMF file has been generated locally or downloaded from the web, you may require a third-party software package in order to reveal the .SMF object contents, play it back within an audio player or apply internal adjustments to the vector .SMF image in the graphical editor, compatible with the file standard.
Wikipedia:
Appspeed SkinMagic Toolkit
Serif DrawPlus
Apple QuickTime Player