General lithology ORM diagram

This object-role modeling (ORM) diagram sample shows schema for general lithology. It was designed on the base of the Wikimedia Commons file: Schema for General Lithology.gif. [commons.wikimedia.org/wiki/File:Schema_for_General_Lithology.gif] "The General Lithology schema (Figure 4) models the structure of a lithology type definition. These definitions provide the logical foundation for classification of rocks into general lithologic classes. A geologic information system should contain a basic set of clearly defined lithologic terms in a standard classification table. ... The General Lithology may have widely varying degrees of specificity. The most general types are defined on only one aspect of the lithology -- e.g. sandstone, mudstone, schist." [pubs.usgs.gov/of/1999/of99-386/richard.html] The object-role modeling diagram example "General lithology ORM diagram" was designed using ConceptDraw PRO software extended with ORM Diagrams solution from Software Development area of ConceptDraw PRO Solution Park.