Using Parent Element Attribute in Prefix Rules

[QuintinSeegers_Personal]

I have a parent Element with an attribute (DayNum). I want to use the value of this attribute in the prefix rules of a child element. I can see that I can reference an Attribute in the PrefixRule, but it doesn't seem to recognise an Attribute from a parent element.

In normal Context Rules, I can refer to the Attribute of the parent using ParentElement[ElementName = "Value"], but that doesn't seem to work in a PrefixRule.

Is this possible?

[frameexpert]

It should work if the EDD syntax is correct.

[QuintinSeegers_Personal]

@frameexpert What would be the syntax if it's not the immediate parent, e.g. what if the Attribute is defined on the Grandparent Element and I need to reference it on the Grandchild Element?

I tried the following:

Prefix rules

 1. If context is: Grandchild < * < Grandparent

       Prefix: Day: <$attribute[Grandparent:Daynum]>

But I just get the following:

Day: 

[frameexpert · Accepted solution]

[QuintinSeegers_Personal]

I must be missing something. This is my EDD:

In the Structure View, I have the DayNum attribute as follows:

and in my document, I see this:

[QuintinSeegers_Personal]

Nevermind. I saw where I made the mistake. My syntax was wrong. It should be $attribute[AttributeName:ElementName], not $attribute[ElementName:AttributeName]. Once I corrected the syntax, it is working as expected.