Patents by Inventor David Edward Tewksbary
David Edward Tewksbary has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230195725Abstract: A computer-implemented method for generating by a query engine a graph of operators for a SPARQL query over an RDF graph. The method includes obtaining a graph of operators executable by the query engine, the graph comprising a plurality of basic operators, at least two of said operators being of a first type each configured to find RDF triples of the RDF graph that match a respective basic graph pattern. The method further comprises identifying a group of operators among the at least two basic operators of the graph which are of the first type. The respective basic graph patterns of the group of operators have same subject and/or predicate and/or object and the identified group of operators is replaced in the graph by an equivalent operator configured to find RDF triples of the RDF graph that match the respective basic graph patterns of the group of operators.Type: ApplicationFiled: December 19, 2022Publication date: June 22, 2023Applicant: DASSAULT SYSTEMESInventors: Frédéric LABBATE, Jean-Philippe SAHUT D'IZARN, Alban ROULLIER, David Edward TEWKSBARY
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Patent number: 10762294Abstract: The databases and methods disclosed herein reduce costly dictionary access (writes and reads) by storing data directly in an index (e.g., storing literal values or taking advantage of Universally Unique Identifiers (UUIDs)), thereby saving time and memory. One example embodiment is a database that includes a dictionary and an index. The dictionary stores associations between keys and data. Each entry in the index includes a plurality of values corresponding to data. A value of the index includes either (i) a direct representation of corresponding data for certain data types, or (ii) a hash of the corresponding data for other data types. The hash is used in the dictionary as a key associated with the corresponding data.Type: GrantFiled: December 29, 2017Date of Patent: September 1, 2020Assignee: DASSAULT SYSTÈMES AMERICAS CORP.Inventors: Alexandre Juton, Pierre-Severin Lanfranchi, David Edward Tewksbary
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Publication number: 20190205380Abstract: The databases and methods disclosed herein reduce costly dictionary access (writes and reads) by storing data directly in an index (e.g., storing literal values or taking advantage of Universally Unique Identifiers (UUIDs)), thereby saving time and memory. One example embodiment is a database that includes a dictionary and an index. The dictionary stores associations between keys and data. Each entry in the index includes a plurality of values corresponding to data. A value of the index includes either (i) a direct representation of corresponding data for certain data types, or (ii) a hash of the corresponding data for other data types. The hash is used in the dictionary as a key associated with the corresponding data.Type: ApplicationFiled: December 29, 2017Publication date: July 4, 2019Inventors: Alexandre Juton, Pierre-Severin Lanfranchi, David Edward Tewksbary
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Patent number: 9582510Abstract: A method and corresponding system upgrades a live computer system. The method begins with migrating a copy of data from a first system to a communicatively coupled second system at a first time. Next, at one or more subsequent times, a copy of changed data is migrated from the first system to the second system until a threshold is reached. Finally, in response to reaching the threshold, a copy of the remaining changed data is migrated from the first system to the second system. A further embodiment of the method comprises: disabling access to the first system during the migration of data at the first time, enabling and maintaining access to the first system at the one or more subsequent times during the migration of the copy of changed data, and disabling access to the first system during the migration of the copy of the remaining changed data. In this manner, the system being upgraded is still highly available throughout the upgrade process.Type: GrantFiled: May 30, 2013Date of Patent: February 28, 2017Assignee: Dassault Systemes Americas Corp.Inventors: Boris Tabenkin, David Edward Tewksbary, William Joseph Upham, Severin Lanfranchi
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Patent number: 8990175Abstract: A computer-implemented method for use in maintaining currency of a projection index of a plurality of database objects. The computer-implemented method includes creating the projection index representative of a connection between a first database object and at least a second database object, determining an entity dependency between the first database object and at least the second database object, determining a path dependency between the first database object and at least the second database object, and updating the projection index in response to a modification of one or both of the entity dependency and the path dependency.Type: GrantFiled: February 7, 2012Date of Patent: March 24, 2015Assignee: Dassault Systemes Americas Corp.Inventors: David Edward Tewksbary, Clark David Milliken
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Patent number: 8925105Abstract: A computer-implemented method for providing security in a relational database hosted by a first server, and configured to interact with a second server, includes associating a first ownership vector with an object in the relational database, detecting a change to the object, and associating a second ownership vector with the object in response to detecting the change to the object.Type: GrantFiled: August 27, 2012Date of Patent: December 30, 2014Assignee: Dassault Systemes Americas Corp.Inventors: David Edward Tewksbary, Clark David Milliken
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Publication number: 20140358854Abstract: A method and corresponding system upgrades a live computer system. The method begins with migrating a copy of data from a first system to a communicatively coupled second system at a first time. Next, at one or more subsequent times, a copy of changed data is migrated from the first system to the second system until a threshold is reached. Finally, in response to reaching the threshold, a copy of the remaining changed data is migrated from the first system to the second system. A further embodiment of the method comprises: disabling access to the first system during the migration of data at the first time, enabling and maintaining access to the first system at the one or more subsequent times during the migration of the copy of changed data, and disabling access to the first system during the migration of the copy of the remaining changed data. In this manner, the system being upgraded is still highly available throughout the upgrade process.Type: ApplicationFiled: May 30, 2013Publication date: December 4, 2014Inventors: Boris Tabenkin, David Edward Tewksbary, William Joseph Upham, Severin Lanfranchi
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Patent number: 8788513Abstract: A computer system and method provides access to Web (global computer network) services data of a target system. The target system exposes data through multiple web services. An application interface is adapted to interface with the target system re-using existing (predefined) web services among applications for the target system. The application interface queries the exposed data. A mapping member maps between application interface query of exposed data and syntax of objects useable in a subject application. The mapping member enables the subject application to access data of object instances generated in response to the query.Type: GrantFiled: October 30, 2009Date of Patent: July 22, 2014Assignee: Dassault Systemes Americas Corp.Inventors: David Edward Tewksbary, Anup Chandran, Boris Tabenkin
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Publication number: 20140059699Abstract: A computer-implemented method for providing security in a relational database hosted by a first server, and configured to interact with a second server, includes associating a first ownership vector with an object in the relational database, detecting a change to the object, and associating a second ownership vector with the object in response to detecting the change to the object.Type: ApplicationFiled: August 27, 2012Publication date: February 27, 2014Applicant: Dassault Systèmes Enovia Corp.Inventors: David Edward Tewksbary, Clark David Milliken
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Publication number: 20130204853Abstract: A computer-implemented method for use in maintaining currency of a projection index of a plurality of database objects. The computer-implemented method includes creating the projection index representative of a connection between a first database object and at least a second database object, determining an entity dependency between the first database object and at least the second database object, determining a path dependency between the first database object and at least the second database object, and updating the projection index in response to a modification of one or both of the entity dependency and the path dependency.Type: ApplicationFiled: February 7, 2012Publication date: August 8, 2013Applicant: DASSAULT SYSTEMES ENOVIA CORPORATIONInventors: David Edward Tewksbary, Clark David Milliken
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Patent number: 8170981Abstract: A computer system provides access to both an online transaction processing (OLTP) database server and an online analytics processing (OLAP) database server. The computer system includes a client application adapted to receive a query. According to (a) mode of operation (e.g., read or update) of the client application and (b) synchronization status of the OLAP database server, the client application redirects the query to the OLTP database server or to the OLAP database server. The client application redirects the query to the OLTP database server when the mode of operation is other than a read-only operation or the synchronization status is “unsynchronized”. The client application redirects the query to the OLAP database server when the mode of operation is a read-only operation and the synchronization status is “synchronized”. The computer system further includes an OLTP application server (e.g., Enovia V6) comprising an OLTP adapter and an OLAP adapter.Type: GrantFiled: December 8, 2010Date of Patent: May 1, 2012Assignee: Dassault Systemes Enovia CorporationInventor: David Edward Tewksbary
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Publication number: 20110106803Abstract: A computer system and method provides access to Web (global computer network) services data of a target system. The target system exposes data through multiple web services. An application interface is adapted to interface with the target system re-using existing (predefined) web services among applications for the target system. The application interface queries the exposed data. A mapping member maps between application interface query of exposed data and syntax of objects useable in a subject application. The mapping member enables the subject application to access data of object instances generated in response to the query.Type: ApplicationFiled: October 30, 2009Publication date: May 5, 2011Inventors: David Edward Tewksbary, Anup Chandran, Boris Tabenkin