index domain expression containing self-axis not automatically maintainable

[Matthias Brantner]

A index domain expression that contains a self-axis prevents the index from being automatically maintainable.

For example,

declare collection auctions:auctions as node()*;

declare %ann:unique %ann:automatic index auctions:PersonId
on nodes dml:collection(xs:QName("auctions:auctions"))/self::person
by xs:string(./@id) as xs:string;

doesn't work but

declare collection auctions:auctions as node()*;

declare %ann:unique %ann:automatic index auctions:PersonId
on nodes dml:collection(xs:QName("auctions:auctions"))
by xs:string(./@id) as xs:string;