Sorry about the crappy formatting BTW, this is just a demo. ;)
$[${item}.txt.abstract]
${title}: $[${name}.abstract]
[score: ${score}, name: ${name}, is_node: ${is_node}]
<{!-- don't forget to list the sub-items --}>
${title}: $[${name}.abstract]
[score: ${score}, name: ${name}, is_node: ${is_node}]
<{!-- no sub-items here --}>