[relaxng-user] E "oneOrMore" contains "group" contains "attribute" again...

[Hutchison, Ben]

I have some further questions related to the issues I had last week in a
thread "Jing & Trang errors when processing RNC grammar".

I have read 7.1.2 of the spec and now appreciate the above pattern is
forbidden. However, what I have not found is any examples showing
alternatives approaches where you do need to specify that attributes be
present on members of a repeated subgroup.

Bob Foster's suggested fix to my original schema is shown below. Note that
the NamedElementAttributes are specified for ConfigGroups. I also require a
name attribute to be present for all elements in the ConfigValue group as
well, but when I include this it becomes an illegal grammar. At the same
time, I don't want a top-level blanket requirement of a name attribute for
every element in the grammar, because eg array elements are not named.

Does anyone have a reliable approach or "algorithm" for specifying
attributes in these sorts of situations? 
Regards
Ben

namespace rng = "http://relaxng.org/ns/structure/1.0"
datatypes xsd = "http://www.w3.org/2001/XMLSchema-datatypes"

start = element ConfigRoot  { ConfigGroup* }

NamedElementAttributes =
    attribute name { text },
    attribute platform { text }?

StringValue = element StringValue { xsd:string }
IntValue = element IntValue { xsd:integer }
FloatValue = element FloatValue { xsd:float }
BooleanValue = element BooleanValue { xsd:boolean } PrimitiveValue =
(StringValue | IntValue | FloatValue | BooleanValue)

Map = element Map { (MapEntry)* }
MapEntry = element MapEntry { PrimitiveValue }
Array = element Array { (PrimitiveValue)* }

ConfigValue =  ( PrimitiveValue | Map | Array )

ConfigGroupEntry = (ConfigGroup |  ConfigValue)

ConfigGroup =  element ConfigGroup {
    ConfigGroupEntry*,
    NamedElementAttributes
}


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