I am resending this note from yesterday afternoon.  I apologize to those of
you who have received multiple copies.  I received a few "Out of Office"
replies so I know the original note got to a few folks, but I don't believe
it was sent to the entire distribution list.  (For example, I didn't get a
copy.)

-----Original Message-----
From: Falbowski, Ellen 
Sent: Tuesday, July 16, 2002 4:07 PM
To: [EMAIL PROTECTED]; '[EMAIL PROTECTED]'
Cc: '[EMAIL PROTECTED]'; [EMAIL PROTECTED]
Subject: RE: Testing for levels 3, 4, and 6 


Here is the most important point I've taken from Sunny Singh's and Chris
Feahr's notes:  it is much more difficult to test for semantic compliance
with an implementation guide than it is to test for syntactic compliance,
because the semantic notes are in text and the syntax rules are
programmable.  For example, a semantic note in the X098, page 248, reads
"Required on all claims involving ambulance services."  A syntax rule on the
same page reads, "P0102 - If either CR101 or CR102 is present, then the
other is required."  The text note does not provide enough information to
program;  the "P0102" is unambiguous and programmable.  Perhaps what we need
to do in X12 is move our semantic "rules" in our standards and guides out of
text and into unambiguous, programmable rules.  These rules can then be
loaded from the table data on wpc-edi into the translators, mappers,
validators, and other tools that we all use, ensuring that we all share the
same interpretation of these rules.

Yes, some semantic rules will be harder to program than others, and perhaps
some rules will never be programmable.  (My semantic example above would
require creating a rule that says a segment -- in this case, the CR1
Ambulance Transport Information segment -- must be present if any instance
of a certain data element -- in this case, the SV101-2 Procedure Code --
contains a code value from a subset -- in this case, a list of ambulance
services -- of an external code list -- in this case, HCPCS and/or CPT
codes.)  But that should not stop us from programming the ones we can.  It
may take slightly longer to do this in the standard or IG development
process, but it should save us enormous amounts of time on the testing side,
and eliminate a lot of ambiguity that currently plagues the production side.

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