Abstract: A method of entering, structuring, storing and transferring data using a hierarchical data model and flat forms. The method includes the following three steps, which typically are performed during the design phase: Selecting a first form from a plurality of forms, alternatively creating said first form by use of a form tool, said first form comprising a number of fields, each having an individual field name, obtaining a field name list from a hierarchical data model, where the field names of the field name list contain information on the data types for the fields of said first form as well as hierarchical information, said field names being defined in accordance with a predefined naming convention, and creating by use of the form tool and the information in the field name list the HTML-code for displaying said first form in an HTML browser.