FW: TOSCA regex format?

I received the following question from a TOSCA user regarding regular expressions:

I don’t see any mention of the regular _expression_ syntax which TOSCA is following.

Unfortunately this can vary a bit.

As an example:

- YANG, with its XML heritage, uses XML family syntax

o A regex is implicitly always anchored start and end (^ and $ are always implied at the ends)

- JSON Schema uses _javascript_ syntax

o A regex is never implicitly anchored so you need to add ^ and $ for most regexp on an attribute

I think the TOSCA spec has to make a statement on this, either to pick a format or say it is engine dependent (which I don’t think is the best choice as this affects portability).

I agree that the spec should be very clear about the regex syntax. Any opinions?

Thanks,

Chris

tosca message