21. The semantic relational database of claim 11 wherein said phrase registry data store of definitions refers to a stored data item by a multipart key, the multipart key comprised of at least two parts, including an Install ID representing a registered database system in which the data item was created, and an Item ID representing the data item within its registered database system.
11. A semantic relational database system, comprising: a phrase registry data store of definitions recorded in a computer readable medium and storing phrase definitions that include word phrase definitions and sentence phrase definitions, wherein the word phrase definitions include data entity type phrase definitions and relationship type phrase definitions; a sentence data structure recorded in the computer readable medium and storing sentences composed of three or more of the phrase definitions according to constraints, wherein the sentences are instances of relationships between two of the phrase definitions, the relationships are defined by the relationship type phrase definitions, and the constraints permit at least one of the relationship type phrase definitions to define a relationship between a sentence phrase definition and another of the phrase definitions; at least two data handlers recorded in the computer readable medium, including a sentence data handler and a word phrase data handler; and an index and retrieval system receiving at least one query phrase definition from a user and processing the query phrase definition by accessing the computer readable medium and employing the sentence data handler, contingent on the query phrase definition matching a phrase definition of a sentence at least partly composed of a sentence phrase definition for another sentence, to retrieve the sentence and the other sentence and to syntactically traverse the sentence and the other sentence into an ordered representation of at least two relationships defined by those two sentences, and by employing the word phrase data handler to report to the user data entities of the two sentences in an order determined by the ordered representation.