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Topic: Oracle BI Publisher: transmission of reports

All greetings.
We start to study BIP and OBIEE.
We have a heap of reports in BIP where the string parameter containing specific date without time, for example ' ' should be transferred 2/17/2017.
There is an idea to create uniform unified  for input of this parameter with usage of built in "calendar", and further to transfer it in specific report BIP.
Prompt, if it is possible,  how to describe this parameter and on what stage to transform the accepted date at line?