The two DTSs are not equivalent.

DTS1 starts at dts1206a.xsd
DTS2 starts at dts1206b.xsd

The diff path is:

[EvChange] Change with parameters dts:ConceptD and dts:ConceptD -> [EConceptType]

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The two DTSs are not equivalent.

DTS1 starts at dts1206a.xsd
DTS2 starts at dts1206c.xsd

The diff path is:

[EvChange] Change with parameters dts:ConceptC and dts:ConceptC -> [EConceptType]