How can I get current time stamp and it's operations in WSO2 BPS Server 3.1.0

题

I am working on the WSO2 BPS Server 3.1.0, How can I get the current timestamp and

How can I perform the subtract operations on these Time Stamp.

I Tried like this:-

get-property('SYSTEM_TIME')

It's not working.

解决方案

What about current-dateTime() with XPath 2.0?

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