Fix completion & hover based on XSD with elementFormDefault="unqualified"

[angelozerr]

Fix completion & hover based on XSD with elementFormDefault="unqualified"

See redhat-developer/vscode-xml#311

Signed-off-by: azerr [email protected]

[angelozerr]

To test this PR:

• open foo-qualified.xml which is in this PR
• open completion after bar, you should see item (the fix).

or try the user usecase redhat-developer/vscode-xml#311 (comment)

[datho7561]

For the user use case, I tried deleting <subtitle></subtitle> element, and then opening completion. It is specified as min 0 max 1, but it isn't suggested. If I open completion after <subtitle></subtitle>, it suggests adding another subtitle element:

[angelozerr]

@datho7561 have you configured the XML catalog?

[datho7561]

@datho7561 have you configured the XML catalog?

Thanks oops.

[datho7561]

I configured the catalog, and now it works for the root level, but not nested elements:

[angelozerr]

I configured the catalog, and now it works for the root level, but not nested elements:

Indeed there were a problem with XML catalog. Please retry it.