A Graphical Query Language: VISUAL
نویسنده
چکیده
VISUAL is a graphical query language designed for scientific databases. VISUAL is icon-based and is suitable for domains where visualization of the relationships are important for the domain scientist to express queries. Graphical objects are not tied to the underlying formalism; instead, they represent the relationships of the application domain. VISUAL supports relational, nested, and object-oriented models naturally and has formal basis. Interpretation and execution semantics are developed separately for efficiency considerations. A user-friendly graphical user interface is designed. Translations from VISUAL to a complex algebra (for query processing purposes) and the Object Query Language (for portability considerations) are presented. Concepts of external and internal queries are developed as modularization tools. A new parallel/distributed query processing paradigm is presented. VISUAL query processing techniques are also discussed.
منابع مشابه
VISUAL: A Graphical Icon-Based Query Language
VISUAL is a graphical icon-based query language designed for scientific databases where visualization of the relationships are important for the domain scientist to express queries. Graphical objects are not tied to the underlying formalism; instead, they represent the relationships of the application domain. VISUAL supports relational, nested, and object-oriented models naturally and has forma...
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