Attempts to convert a string to boolean true() or boolean false() by applying a special "flag-based string-to-boolean conversion" principle. This principle consists of using an internal list that is a mapping between string values and truth values.
The "flag-based string-to-boolean conversion" principle contrasts with the XSLT 1.0 rules for string-to-boolean conversion, which state that any non-empty string converts to true() and only the empty string converts to false() .
The flag-based conversion is performed case-insensitively. If yes is associated to boolean true(), then so are Yes and YES.
The required string is the string value that you want to convert using "flag-based string-to-boolean conversion".
This example returns the text "Executed verbosely" if the runtime user passes one of the following on the command line:
but not if he passes one of the following, or nothing at all:
The booleanflags:ToBoolean() function is necessary to get this behaviour. If it were omitted, the text "Executed verbosely" would always appear because the test would be whether or not the verbose variable had a non-empty string as a value. This is always the case because of the pc:assign-string-default line.