Open XML Paper Specification known as XPS consists of structured XML markup that determnes the layout and visual appearance of each page within the document. The markup language is a subset of XAML which allows it to incorporate vector-graphics in documents. Microsoft developed XPS with the intention of creating an alternative to PDF.
An XPS file is a unicode ZIP archive which use the Open Packging Conventions and contain the files which make up the document. The files includes are an XML markup file, text, embedded fonts, raster images, 2D vector graphics and any DRM (Digital Rights Management) information. These contents can be reviewed by opening in an application that supports ZIP files.
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BMP is a standard image file format which was historically used by computers running the Windows operating system. The format is more commonly know as Bitmap files. The term bitmap was originally coined in computer programming to refer to a map of bits. Historically when you saved an image on your home PC you might have saved it as a .bhp file, this is becoming less common with .jpeg the preferred image file format with the advent of digital cameras.
Bitmap files are housed in a device-independent bitmap (DIB) format. The term device independent means that the bitmap specifies pixel color in a form independent of the method used by a display to represent color. This enables Windows to show the bitmap on any type of display device - such as your monitor.
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