provide access to parent object (via $parent) inside @iterate.

[zarac]

e.g.

 {?._attachments}
 <section class="file list">
 Files
 {@iterate key=._attachments}
 <a href="{$parent._id}/{$key}" title="{$value|js|n}" target="_blank">{$key}</a>
 {~s}
 {/iterate}
 </section>
 {/._attachments}