[Lager] Proposed Schema Change - class-or-set-operator-nested

[Wil Tan <[e-mail]>]

On Sat, Apr 30, 2016 at 2:10 AM, Asmus Freytag (c) <[e-mail]>
wrote:

>
> PS: we do need to pick up Wil's tweak on the schema, which is not merged
> yet


This is a minor refactor of the "class-or-set-operator-nested" production
which I made to get around an error when using libxml2 to validate an LGR
document [1].

I have now created a pull request about this.

The class-or-set-operator-nested production can be a class-invocation,
class-declaration, or set-operator. However, presumably due to
class-invocation and class-declaration both having "class" element names,
it seems that libxml2 is having trouble validating some documents.

This proposed change defines a class-invocation-or-declaration production
that encapsulates the alternate sets of attributes allowed in
class-invocation and class-declaration.

The diff can be seen here:
https://github.com/kjd/lgr-specification/pull/4/files

[1]
https://www.icann.org/en/system/files/files/proposal-khmer-lgr-15apr16-en.xml
failed with error message "Element class failed to validate attributes" on
line 190 when it encountered a <class from-tag="base-only" />

.wil