14.3 Editing the file header

The keywords in a XAS file header are normally set by the program which generates the file, and may be altered (added or modified) by other programs which manipulate the file, or inherited by children files. In particular a sequence of HISTORY keywords keep track of the manipulations done.
It is however possible to edit one header keyword at a time also manually using the appropriate program. This command can be invoked in two ways :

Note that "duplicatable" keywords (typically HISTORY and COMMENT) are always interpreted as new keywords. It is not possible to alter the previous values of an existing duplicatable keyword. It is also not possible to assign as a value a string containing imbedded blanks.

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