The 3-tuple data modeling

We propose the 3-tuple data model which supports a bottom-up approach to develop a database. In this approach, the user stores data first, and then structures the data by a schema, using free objects. This data model consists of three basic ideas: (1) n-order finite directed labeled graphs; (2) unification of data and meta data (schema); (3) free object independent from any classes (schema). A full range of data, from weakly structured data like hypertext/hypermedia to strongly structured data like traditional databases, can be represented by this data model.