HI
We discussed the proposition of data type extension for
managing “mg/kg” type dosage expression at the HL7 UK TC
meeting.
HL7 UK seemed happy to stick with the derivation.Expr
way of doing things, on the grounds that everyone was going to have to get to
grips with an OCL at some stage (maybe GELLO…) and that putting structure into
xml was possibly less valuable than working with OCL, in the long run. I
think this was the crux of the debate, anyway – it was very much at the limits
of my range of skills….. Although I presented it pretty much as in Gunther’s
e-mail, and even though folk kept saying “no, that’s not right” actually, when
we dug, we decided “yes, it is because….”, all to do with the relationship
between the meaning of derivation.Expr and the mood of the act and the related
observation, and how it all hangs together……
We did feel the RIM definition for derivation.Expr was a
little ambiguous, as there were folk who thought this attribute specifically
should be used to describe how a stated “value” has been calculated when there
are more than one way, whereas the actual definition “allows” for the
interpretation we are thinking of for SBADM dosing but it would be good to have
it stated that the derivation.Expr can be used “to give calculation information
to be used to reach a value” as well as “to show how a value was
reached”.
Definition:
A character string
containing a formal language expression that specifies how the Act's attributes
are derived from input parameters associated with derivation relationships.
Possibly…..
Definition:
A character string
containing a formal language expression that specifies how the Act's attributes
are (should be/have been) derived
from input parameters associated with derivation relationships.
I don’t feel that there is
consensus on how to do variable doses, but I do need to get somewhere more
concrete quickly, please….. and it’s not something I have enough expertise in to
know what is best……..so, please, those of you who
do…..
Maybe this should be copied
to folk on “data type” lists – wherever they may
be……
I’ve copied this to MnM as a
start……, with the attachment of my summary of Gunther’s original proposal, which
is what I presented to HL7 UK
I look forward to the
discussion, even if there are bits I cannot follow
Best
wishes
Julie
Julie M James MRPharmS
Blue Wave Informatics LLP
91a
EX4 3RP
julie_james@bluewaveinformatics.co.uk
+44 (0)7747 633216
+44 (0)1392 271274