Freemarker special symbol usage

Question

What does below structure means in ftl? How do I create my own? Where can I find more info about it? Google doesn't seem to follow this.

@[someArray.someVariable]

Answer 1

Search by term XPath. @ in xpath mean "attribute". XPath is language of selecting nodes in XML.

<node attribute="value">

node[@attribute] = value in XPath.

Answer 2

If it was indeed a FreeMarker expression, then it means nothing special, as @ is a legal variable name. So it's just like myHash[whatever] , only the variable is called @ , not myHash .