[DDI-SRG] Schema module imports

[arofan.gregory]

Folks:

Here is a breakdown of the imports in the current (CR2a) draft of the
schemas.

I will try to come up with a set of suggested changes, but I will note a few
issues here:

- xml.xsd is imported into too many schemas. This is messy and not needed.

- We know that there are issues with dataset, as Achim has identified.

- It seems like there is some random/inconsistent importing going on. We
need to decide which modules can be instantiated as stand-alones, and then
remove some of the imports. Note that everything which is non-end-node (such
as dcelements and xml.xsd) imports the resuseable.xsd schema. Also, merging
archive.xsd and organization.xsd removes much of the messiness and
inconsistency.

It would be possible to have everything always exist inside a DDIInstance
element, and we could simply import everything at that level and not worry
about it. This may be a bit draconian, but if we do anything else we will
need to think about which modules can be instantiated (perhaps Group,
StudyUnit, ResourcePackage, etc.) Note that if we make such a policy, it
will not be enforced by the parser, only by the documentation.

Anyway, let me know what you think, and I will try to formulate a plan for
cleaning these up.

Cheers,

Arofan

_______________________________

Schema Imports for DDI 3.0 CR2a
_______________________________


archive.xsd

- reusable.xsd
- organization.xsd (pre-CR3)

comparative.xsd

- conceptalcomponent.xsd
- datacollection.xsd
- logicalproduct.xsd
- reusable.xsd

conceptualcomponent.xsd

- reuseable.xsd

datacollection.xsd

- xml.xsd
- reuseable.xsd

dataset.xsd

- reuseable.xsd
- physicaldataproduct.xsd

dcelements.xsd 

- simpledc20021212.xsd

ddiprofile.xsd

- reuseable.xsd

ddi-xhtml11.xsd

- xml.xsd (everything else is with includes)

ddi-xhtml11-model-1.xsd

[None]

ddi-xhtml11-modules-1.xsd

[None]

group.xsd

- reusable.xsd
- archive.xsd
- comparative.xsd
- conceptualcomponent.xsd
- datacollection.xsd
- logicalproduct.xsd
- physicaldataproduct.xsd
- physicalinstance.xsd
- ncube_recordlayout.xsd
- tabular_ncube_recordlayout.xsd
- inline_ncube_recordlayout.xsd
- studyunit.xsd
- organization.xsd (Pre-CR3)
- ddiprofile.xsd

inline_ncube_recordlayout.xsd

- xml.xsd
- reuseable.xsd
- physicaldataproduct.xsd

instance.xsd

- xml.xsd
- reuseable.xsd
- archive.xsd
- dcelements.xsd
- group.xsd
- studyunit.xsd

logicalproduct.xsd

- reuseable.xsd

ncube_recordlayout.xsd

- xml.xsd
- reuseable.xsd
- physicaldataproduct.xsd

organization.xsd (Pre-CR3 - moves into archive.xsd in CR3)

- reuseable.xsd

physicaldataproduct.xsd

- xml.xsd
- resuable.xsd

physicalinstance.xsd

- reuseable.xsd

reuseable.xsd

- xml.xsd
- ddi-xhtml11.xsd
- dcelements.xsd

simpledc20021212.xsd

- xml.xsd

studyunit.xsd

- reusable.xsd
- archive.xsd
- conceptualcomponent.xsd
- datacollection.xsd
- logicalproduct.xsd
- physicaldataproduct.xsd
- physicalinstance.xsd
- ncube_recordlayout.xsd
- tabular_ncube_recordlayout.xsd
- inline_ncube_recordlayout.xsd
- ddiprofile.xsd

tabular_ncube_recordlayout.xsd

- xml.xsd
- reuseable.xsd
- physicaldataproduct.xsd

xml.xsd

[None]