Defining Custom Accounting Types.

If the built-in accounting methods do not meet your requirements, you can implement your own accounting methods. There are two ways for doing so:

1. Using a Guile procedure.
2. Using an external program

To use a Guile procedure for accounting, the name of the procedure must be specified as a value to Scheme-Acct-Procedure attribute in RHS list of a `hints' entry, e.g.:

    DEFAULT NULL Scheme-Acct-Procedure = "my-acct"

For a detailed description of Scheme accounting procedures, See section Accounting with Scheme.

Another way of implemementing your own accounting method is using an external program. This is less effective than the methods described above, but may be necessary sometimes. To invoke the program, use the following statement in the LHS of `hints' entry:

    Acct-Ext-Program = "progname args"

The progname must be the full path to the program, args --- any arguments it needs. The usual substitutions may be used in args to pass any request attributes to the program (see section Macro Substitution).

For a detailed description of Acct-Ext-Program, See section Acct-Ext-Program.

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