Thank you for your interest in Bizagi.
Bizagi offers a very intuitive way to interact whit the data model, called XPath. using this concept you can navigate through the data model to obtain or set values into the database.
If you want to have a deeper approach about how to obtain information from database and have a better understand of Xpath please read the following article: (http://wiki.bizagi.com/en/index.php?title=Using_Xpath
As a new user, we encourage to visit our web site, where you can find documentation, videos and e-learning material to begin a project with Bizagi Studio (http://www.bizagi.com/index.php?option=com_content&view=article&id=15&Itemid=41&lang=en
Bizagi BPM Suite Support.