Re: [ebxml-bp] ebBP 2/4/2005: Webber Questions (part 2 of 2)

["David Webber \(XML\)" <david@drrw.info>]

Monica,

OK - I went back and found the EndsWhen / BeginsWhen section.

Now I'm thinking this part - Lines 1195 to 1202 is misleading - I
think we first need to state the principles of operation here:

Current text: For endsWhen, in the care of a certification exam.  A
registrant is allowed three attempts to pass an exam to achieve
certification; otherwise the registrant fails. In an academic setting, a
health care provider, i.e. the registrant, attempts the certification exam
three times. For the first try, the registrant submits a certification
request and engages in a registration step. The registrant request fails and
is returned. The registrant increases insurance, retries and fails. For a
third try, the registrant increases staff capacity, then retries. The
registrant requests fails a third time. The registrant attempts to
re-register but must start over again. This scenario may apply to other than
health care, such as Amazon self-registration.

Insert before this after line 1194:
The beginsWhen expression MAY be used to:

·         Link a semantic state (e.g. begins when "state" of
"product-delivered" is reached)

·         Serve as a semantic definition that MAY be used to define that
state (e.g. "in the context of this BPSS, "product-delivered" is defined as
the existence of both product-delivered date and delivery-signature)

o    and expression must evaluate to a simple true / false boolean



An example of this would be:  beginsWhen="validOrderReceived OR
backOrderFulfilled"

The conditionals themselves will be variables that have been defined in the
BPSS variables section.  And associative expression then relates the
evaluation of the

conditional.  In the case of the beginsWhen - this will normally reference
an outcome from the preceeding BTA step.  In the case of an endsWhen - this
will relate to

current BTA step, and that BTA step will continue to iterate until the
endWhens is fulfilled, or the BTA fails (matching one of the guard
conditionals).

So in the case described below the endsWhen is conditional on
endsWhen="certificationPassedOK", and the guard conditional is "Fail" when
"retries>2 AND NOT certificationPassedOK".



Thanks, DW