What is the .CALS File Extension?
.CALS File Extension Description:
The CALS file extension is used for document imaging that stores only black and white meaning 1-bit image data. There are two types of files with the .cals file extension specified as:
* Type I - stores only single and monochrome image per file have been compressed with the use of the CCITT Group 4 encoding and is appended to the raster header record data block;
* Type II - contains multiple images per file and the image data is stored using the CCITT Group 4 encoding algorithm. This type also supports the encoding of image data as a collection of tiles or is separately stored in its raw, un-encoded format.
The files with the CALS file extension are defined primarily in the following military standards documents:
* MIL-STD-1840A - the governing standard for data interchange known as the Automated Interchange of Technical Information; and
* MIL-R-28002A - the Raster Graphics Representation' requirements that is in a Binary Format
The CALS raster format was developed in the 1980s by the Computer Aided Acquisition and Logistics Support office of the U.S. Department of Defense. This is to standardize the Office Document Interchange Format (ODIF) for electronic publishing, particularly in CAD/CAM, technical graphics, and image processing applications. The CALS file extension is also used in the Office Document Architecture (ODA) system for compound document data exchange between software applications and multiple machine platforms.
Files with the .cals file extension integrate text, graphics and image data into the standard document architecture. The main purpose for its development is to improve and integrate the logistics functions of the military and its contractors. This means that all U.S. federal government technical publications must conform to the CALS standard.
Each file in the CALS file extension starts with a record identifier, which is a string of ASCII characters followed by a colon plus a single space. Immediately follow the record identifier's Record data. If this record shows no content of any significant data, NONE (ASCII string) will be written subsequent to the identifier.
The CALS file extension is widely used by the computer industry in commercial applications such as CAD/CAM. The aerospace industry also uses files with the .cals file extension, which owes a large part of its business to military and government contracts.Author: CALS DND
Author URL: http://www.acq.osd.mil/cals/
Related Applications: CAD/CAM
Common Path: C:/ Program Files/
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The Typical Reason for .CALS files Errors:
A typical and frequent reason for .CALS files errors is failure in the Windows registry - cleaning is needed to prevent more corruption in other software and/or system devices. Dangers include system device failure, blue screen errors and fatal crashes.
.CALS files Errors - Common Symptoms:
.CALS files errors bring on numerous symptoms, including: computer locks on start up or shut down, softwares freeze up, reduced computer performance, internal speaker beeping, problems accessing documents, sluggish behaviour and software installation trouble.
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