DMN12 — Parameter names of built-in function date and time(date, time) are not allowed by name rules

Table 58 on page 131 defines the built-in function date and time(date, time) with parameter name "date" and parameter name "time".

But on page 109 additional syntax rules are listed:
"A name start (grammar rule 28) SHALL NOT be a language keyword."

These two definitions are conflicting.

Since "date" and "time" are language keywords (listed in grammar rule 62 for date time literal) the parameter names are illegal. The invocation of the built-in function with named parameters is not possible:
date and time(date: date("2017-01-01"), time: time("11:00:00"))

The recommendation is to define other named parameter names for the built-in function:

• rename "date" parameter to "date part"
• rename "time" parameter to "time part"

remove date builtins as keywords

see revised text