rspo/host_spool/print is a SAP Parameter attribute which is used to control Print command for host system (access method L) information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
The value of this parameter is used as a pattern to form the
print command for access method L. In the pattern you can use
& parameters for parametrization (for example, &P for the current
printer name). These placeholders are replaced when creating the
print command for a particular request according to its
parameter. For more information, refer to Notes 6753, 15355 and
10937.
If the print command delivers a request ID, then this can be
transferred to the R/3 System
(
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See SAP Parameter Documentation for full SAP documentation for this profile parameter.