How to update a biblio field with Entity Metadata Wrapper? I can update a field using Entity Metadata Wrapper (EMW). Here's how I can accomplish this.

$node_wrapper = entity_metadata_wrapper('node', $nid);
$node_wrapper-&gt;field_custom_field='new value';


However, I'm not able to access and update biblio fields provided by biblio module in the same way. This code won't work

 $node_wrapper-&gt;some_biblio_field='new value';


How can I update biblio fields using EMW?
The Bibliography module isn't using D7's field API. It's misleading since the module's manage fields UI (/admin/structure/types/manage/biblio/fields) does make it appear as if it's using the field API; however it installs its own database schema for storing data for Bibliography nodes.

As such, Entity API's EMW isn't much help in your case.