CODEWITHSUNDEEP
xmlxpathxsd
Adam
Adam

Reputation: 488

XSD Keyref field only works with ".", instead of element name?

Why are the below schemas different? I am just trying to make a simple keyref, and I can provide more context if necessary...

<!-- This works -->
<xsd:keyref name="followsKey" refer="userKey">
    <xsd:selector xpath="user/follows" />
    <xsd:field xpath="." />
</xsd:keyref>

<!-- This doesn't -->
<xsd:keyref name="followsKey" refer="userKey">
    <xsd:selector xpath="user" />
    <xsd:field xpath="@follows" />
</xsd:keyref>

Upvotes: 0

Views: 42

Answers (1)

Michael Kay
Michael Kay

Reputation: 163468

They are different in that one refers to an element named "follows", the other refers to an attribute named "follows".

If the second one were written <xsd:field xpath="follows"/>, it would differ from the first in that it would only work if a user element has a single follows element child, whereas the first allows a user to have multiple follows children, each of which acts as a keyref.

Upvotes: 2

Related Questions