can contain multiple values, separated by a comma "," where multiple
links will then be created on each item. For instance, a field named "pmid" with an entry "11932250,34718705" would create two links. If
an entry of comma-separated values contains a "|" symbol, the part
before the pipe symbol is used to replace the $$ wildcard and the part
after it is used as the label, as opposed to the default label
description in the .as file.
This can be handy for both providing a unique label for each link, and
having multiple link outs for some items, while others may only have one
or no link.