LYCOS RETRIEVER 
File Format: Information
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The Mpxfile.wri file (Windows) and the MPX File Format file (Macintosh) describe the format of MPX 4.0 files created in Microsoft Project, versions 4.0, 4.1, and 98. You can find these files in the folder where you installed Microsoft Project version 4.0 or 4.1. The "More Information" section of this article contains the complete text of the Mpxfile.wri file.
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File-based production sound recorders 7-Series recorders write files in the Broadcast Wave Format, or BWF files. These files are identical to WAV files with the addition of a BEXT (broadcast extension) chunk in the file header. This added metadata chunk is only viewable by Broadcast Wave-aware applications. BWF files include data such as scene and take information, time code value, time code rate, unique file identifiers, and all sorts of other data (see sample). BWF data enables WAV files to carry time code information. The time code value in a BWF file is represented as the number of samples since midnight.
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Because the PE format always talks in terms of RVAs, it’s difficult to find the location of the required information within a file. A common practice while accessing a PE file is to map the file in memory using the Win32 memory mapping API. It’s a bit complicated to calculate the address for the given RVA in this memory-mapped file. You first need to find out the section in which the given RVA lies. You can accomplish this by iterating through the section table. Each section header stores the starting RVA for the section and the size of the section.
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File::Format::RIFF inherits from File::Format::RIFF::Container, so all methods available for Containers can be used on RIFF objects. A Container essentially contains an array of RIFF lists and/or RIFF chunks. See the File::Format::RIFF::Container page for more information.
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Scitex LW/CT--The CT format is an uncompressed raster file that includes all of the original raster picture information assembled according to the final layout. The Linework file contains any information that was originally vector prior to rasterization and was rasterized at a higher resolution than the CT in order to maintain the necessary detail required for fonts, and other vector graphics. Since this raster file could be very large due to the resolutions used (typically in the 1800 dpi to 3500 dpi range), Scitex uses RLE compression to reduce the file size. In an effort to address a 248-color area limitation of the original LW format, Scitex developed NLW. This new format extends the available color areas to about 16,000, which allow for smooth LW blends and other value-added benefits.
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This approach offers better guarantees that the format will be identified correctly, and can often determine more precise information about the file. Since reliable "magic number" tests can be fairly complex, and each file must effectively be tested against every possibility in the magic database, this approach is ... relatively inefficient, especially for displaying large lists of files (in contrast, filename and metadata-based methods need check only one piece of data, and match it against a sorted index). Also, data must be read from the file itself, increasing latency as opposed to metadata stored in the directory. Where filetypes don't lend themselves to recognition in this way, the system must fall back to metadata. It is, however, the best way for a program to check if a file it has been told to process is of the correct format: while the file's name or metadata may be altered independently of its content, failing a well-designed magic number test is a pretty sure sign that the file is either corrupt or of the wrong type.
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