ABSTRACT
An inverted-L chart is a tool for graphically representing a data structure. Inverted-L charts are often used with entity-relationship diagrams to document the attributes that make up an entity. The completed inverted-L charts represent a preliminary set of logical data structures. An inverted-L chart is a clear, easy-to-visualize, graphical model of a data structure. The inverted-L model lacks many of the necessary details that must be recorded in the data dictionary, however. Move down to the second inverted-L chart and find the link that reads Supplies inventory. Additionally, many tools for creating entity-relationship models also support inverted-L charts. The entity name appears at the top of the imaginary upside-down letter L. Attributes are listed under the entity name, and some analysts like to include the data type or a picture clause for each attribute. If an inverted-L chart is prepared in conjunction with an entity-relationship model, the entity-relationship model is generally prepared first.
