As the Object model is too long to nicely fit on a document - the link to the lucid chart with the ERD is here for viewing.
This object model contains all the fields on the Asperato objects. Anything prefixed asp04 is standard Asperato, anything prefixed ffasp is Certinia Asperato Connector package.
Salesforce do provide a schema builder should you wish to view this in your Salesforce org directly (navigate to set up > quick find > Schema builder) and then select the objects you wish to view.
If you have specific questions on the object model you can email support@asperato.com