inc/functions/value.php
value(field, separator, template, header, footer) gets the values of a field in a page
Use this, if you need a field from the same page.
If you need a field from another page and you know the name, use the extvalue function. If you don't know the name, use the query function to search for it. If you need only the first value of the field, use the firstvalue function.
The arguments separator, template, header and footer are optional. If not empty, the fields use the provided template, are separated by separator, preceeded by header and followed by footer.