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What Is FML
Field Manipulation Language, or FML, is a set of C language functions for defining and manipulating storage structures called fielded buffers, that contain attribute-value pairs in fields. The attribute is the field's identifier, and the associated value represents the field's data content.
Fielded buffers provide an excellent structure for communicating parameterized data between cooperating processes, by providing named access to a set of related fields. Programs that need to communicate with other processes can use the FML software to provide access to fields without concerning themselves with the structures that contain them.
FML also provides a facility called VIEWS that allows you to map fielded buffers to C structures or COBOL records, and vice-versa. The VIEWS facility lets you perform lengthy manipulations of data in structures rather than in fielded buffers; applications run faster if data is transferred to structures for manipulation. Thus the VIEWS facility allows the data independence of fielded buffers to be combined with the efficiency and simplicity of classic record structures.
Two interfaces are available for FML and the VIEWS facility:
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