Implement short-to-long ("shtolo") function to generate long form EXPRESS

[ronaldtse]

The "shtolo" function is used to flatten the REFERENCE FROM expressions in schemas. The output is called "long form EXPRESS" which is described in ISO 10303-11.

[ronaldtse]

The mechanism of shtolo is described in ISO 10303-11 Annex G.

[ronaldtse]

@TRThurman : Annex G includes a mechanism to convert the schema to an ISO 10303-11:1994 schema.

G.1 states:

The original implementation methods included in ISO 10303 presupposed a data model consist- ing of a single schema, termed the longform schema. As long as the implementation methods included in ISO 10303 are not updated to this edition of ISO 10303-11 or implementations are not updated to work with the new implementation methods, it may be useful to convert a data specification that is in accordance to ISO 10303-11:2003 to a data specification that is in ac- cordance to ISO 10303-11:1994. This annex specifies rules for how such a conversion may be done. The rules enable the conversion of an ISO 10303-11:2003 multi-schema specification to an ISO 10303-11:1994 longform schema. These rules are designed to result in a complete and consistent longform and to minimize the loss of semantics of the original data model.

And G5 provides the "Stage 2" procedure:

I'd like to confirm that shotolo requires this mechanism implemented. Thanks.

[TRThurman]

Confirmed.

…

On Jan 18, 2021, at 1:47 AM, Ronald Tse ***@***.***> wrote: @TRThurman <https://github.com/TRThurman> : Annex G includes a mechanism to convert the schema to an ISO 10303-11:1994 schema. G.1 states: The original implementation methods included in ISO 10303 presupposed a data model consist- ing of a single schema, termed the longform schema. As long as the implementation methods included in ISO 10303 are not updated to this edition of ISO 10303-11 or implementations are not updated to work with the new implementation methods, it may be useful to convert a data specification that is in accordance to ISO 10303-11:2003 to a data specification that is in ac- cordance to ISO 10303-11:1994. This annex specifies rules for how such a conversion may be done. The rules enable the conversion of an ISO 10303-11:2003 multi-schema specification to an ISO 10303-11:1994 longform schema. These rules are designed to result in a complete and consistent longform and to minimize the loss of semantics of the original data model. And G5 provides the "Stage 2" procedure: <https://user-images.githubusercontent.com/11865/104885933-d1d6f900-59a3-11eb-84a2-eb48df4fe1c2.png> I'd like to confirm that shotolo requires this mechanism implemented. Thanks. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#32 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAMMKVBCEX37PQUGY7AWGTDS2PRQHANCNFSM4UNRALIA>.

[ronaldtse]

Thanks @TRThurman for the confirmation. We will work on this after the publication process is settled.

[ronaldtse]

This task is now active again.