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Extensible RDF databases

  • US 8,489,649 B2
  • Filed: 12/13/2010
  • Issued: 07/16/2013
  • Est. Priority Date: 12/13/2010
  • Status: Active Grant
First Claim
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1. A computer-executed method comprising:

  • a database management system receiving, from a user, definition information for a definition of a new database data type;

    wherein the definition information includes a first mapping between one or more attributes of the new database data type and one or more attributes of a particular base data structure of the database management system;

    wherein the definition information includes a second mapping between one or more attributes of the particular base data structure of the database management system and one or more attributes of the new database data type;

    storing, in an instance of the particular base data structure of the database management system, a particular subject-predicate-object expression that comprises a particular data associated with the new database data type;

    wherein each subject-predicate-object expression corresponds to a subject, a predicate, and an object;

    wherein a predicate describes a first relationship between a corresponding subject and object;

    wherein the step of storing further comprises;

    identifying the particular subject-predicate-object expression as including the particular data associated with the new database data type;

    in response to identifying the particular subject-predicate-object expression, extracting, based on the first mapping, a value of a particular attribute from the particular data of the particular subject-predicate-object expression; and

    based on the first mapping, storing the value of the particular attribute in the instance of the particular base data structure;

    receiving a request for at least a portion of the particular data of the particular subject-predicate-object expression;

    in response to receiving the request, identifying the instance of the particular base data structure;

    based on the second mapping, reconstructing the at least a portion of the particular data of the particular subject-predicate-object expression from the instance of the particular base data structure; and

    returning the reconstructed at least a portion of the particular data in response to the request;

    wherein the method is performed by one or more computing devices.

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