Theoretical Investigation of Access Mechanisms for          Semantically Motivated Database Models
{'Code': '05020000', 'Directorate': {'Abbreviation': 'CSE', 'LongName': 'Direct For Computer & Info Scie & Enginr'}, 'Division': {'Abbreviation': 'IIS', 'LongName': 'Div Of Information & Intelligent Systems'}}
{'SignBlockName': 'Maria Zemankova', 'PO_EMAI': None, 'PO_PHON': None}
The semantically-motivated database models provide constructs for               structuring data which correlate with the ways that database users think        about it.                                                                                                                                                       Prominent examples are the semantic models, the non-first normal form           relational model, and data models for supporting the engineering design         life-cycle.                                                                                                                                                     The research proposed here will focus on the development and theoretical        study of access mechanisms for these models.  These will include a              variety of mathematically defined query langauges for semantic models,          including generalizations of the relational calculus and algebra, and of        deductive databases.  Mechanisms for reducing the inherit complexity of         these query languages will be explored.
{'FirstName': 'Richard', 'LastName': 'Hull', 'PI_MID_INIT': 'B', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Richard B Hull', 'EmailAddress': 'rhull@acm.org', 'NSF_ID': '000205347', 'StartDate': '06/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Southern California', 'CityName': 'LOS ANGELES', 'ZipCode': '90033', 'PhoneNumber': '2137407762', 'StreetAddress': '3720 S FLOWER ST FL 3', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '34', 'CONGRESS_DISTRICT_ORG': 'CA34', 'ORG_UEI_NUM': 'G88KLJR3KYT5', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF SOUTHERN CALIFORNIA', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '685500', 'Text': 'INFORMATION & KNOWLEDGE MANAGE'}
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