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PRC Schema Requirements and Examples #406

Open mvrhel opened 6 months ago

mvrhel commented 6 months ago

In ISO 14739-1:2014

Section 9.4.1 dealing with Schemas talks about EPRCSchema_FatherParent_Type. This is not defined in the document. Perhaps they are referring to EPRCSchema_Parent_Type?

stuartgalt commented 1 month ago

This appears to be a typo. I believe it should be:

The following are some requirements of the schema definition language and its usage

* All of the examples shall have an enclosing block which is not a version block.

* New curves (or surfaces) shall have either the PRC_TYPE_CRV or a particular curve entity type as the 
   EPRCSchema_Parent_Type. The Parent_Type indicates what data will be inherited by the entity in the schema.

* For example, for PRC_TYPE_CRV and PRC_TYPE_SURFACE, attributes, transform, and parametrization are 
  inherited from the Parent_Type.

* The example to add a field to an existing entity did not define the previous data. All new data shall be added 
  to the end of an existing entity.
petervwyatt commented 3 weeks ago

3D PDF TWG agree