This templates does nothing by itself. Don't delete it nevertheless, since it is used to compile {{BS-map}} in to {{routemap}}. See the doc.
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Usage edit
This template is intended to transmit some directives to the compiler when translating a {{BS-map}} into a {{routemap}}.
- Inside of a {{BS-map}} structure, {{BSdirective|this_and_that}} is simply skipped.
- At compile time, string this_and_that is simply unprotected. The parser uses the sed rule:
s¶{{BSdirective|\([^}]*\)}}¶\1¶
The parser process therefore assumes that string this_and_that don't contain any closing curly brace.
This artifex can be used to transmit strange tw values, or any other parameter that is found missing after compilation.