You can use QGraph queries to update (add, delete, or modify) database elements. However, implementation in Proximity is currently limited to using queries to add new links to the database.
You must specify an attribute value for all new links created by queries. The attribute must currently exist in the database and all new links (defined by a single link specification) must be assigned the same value for this attribute.
Create a query that matches the desired objects and links.
In the Add-link area at the bottom of the query properties pane, click Add. The Query Editor adds a temporary, example link specification, shown in the query properties pane.
Edit the temporary, example link specification to show the correct link information. Specify the vertices corresponding to the starting and ending objects and attribute value for the new links.
Press Tab or Return.