A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product...
6 KB (540 words) - 10:03, 29 April 2023
In computing, a snowflake schema or snowflake model is a logical arrangement of tables in a multidimensional database such that the entity relationship...
8 KB (1,015 words) - 11:50, 23 April 2025
the logical schema, however, still did not describe how physically data would be stored on disk drives. That is the domain of the physical schema. Now...
5 KB (530 words) - 13:53, 18 May 2024
Data independence (redirect from Logical data independence)
the same relation. Logical data independence indicates that the conceptual schema can be changed without affecting the existing schemas. The physical structure...
6 KB (752 words) - 21:43, 19 August 2024
a logical data storage structure. An Oracle database associates a separate schema with each database user. A schema comprises a collection of schema objects...
11 KB (1,119 words) - 20:45, 17 March 2025
model. Simply described, a conceptual schema is the first step in organizing the data requirements. Logical schema: describes the structure of some domain...
24 KB (2,837 words) - 07:04, 8 April 2025
A white pages schema is a data model, specifically a logical schema, for organizing the data contained in entries in a directory service, database, or...
4 KB (521 words) - 13:32, 22 April 2023
schema, like natural language and involving logical connectives, which are joined by juxtaposition to other sentences, which in turn may have logical...
11 KB (1,369 words) - 16:04, 17 March 2025
Entity–attribute–value model (redirect from Open schema)
in an EAV database, the "physical schema" (the way data are stored) is radically different from the "logical schema" – the way users, and many software...
66 KB (9,767 words) - 12:12, 16 March 2025
popular versions of axiomatic set theory, the axiom schema of specification, also known as the axiom schema of separation (Aussonderungsaxiom), subset axiom...
15 KB (2,207 words) - 05:19, 24 March 2025
logically equivalent if they have the same truth value in every model. The logical equivalence of p {\displaystyle p} and q {\displaystyle q} is sometimes...
6 KB (751 words) - 03:54, 11 March 2025
will show the source XSD, logical and physical views for a simple schema. <?xml version="1.0" encoding="utf-8" ?> <xs:schema elementFormDefault="qualified"...
9 KB (621 words) - 18:59, 14 November 2024
The T-schema ("truth schema", not to be confused with "Convention T") is used to check if an inductive definition of truth is valid, which lies at the...
4 KB (584 words) - 17:22, 31 December 2024
Logical consequence (also entailment or logical implication) is a fundamental concept in logic which describes the relationship between statements that...
17 KB (1,910 words) - 22:09, 28 January 2025
An image schema (both schemas and schemata are used as plural forms) is a recurring structure within our cognitive processes which establishes patterns...
19 KB (2,346 words) - 00:13, 13 May 2024
Axiom (redirect from Logical axiom)
for reasoning. In mathematics, an axiom may be a "logical axiom" or a "non-logical axiom". Logical axioms are taken to be true within the system of logic...
35 KB (4,918 words) - 15:59, 3 May 2025
Logical truth is one of the most fundamental concepts in logic. Broadly speaking, a logical truth is a statement which is true regardless of the truth...
9 KB (1,094 words) - 10:31, 12 December 2024
Zermelo–Fraenkel set theory (section Axiom schema of specification (or of separation, or of restricted comprehension))
independently proposed replacing the axiom schema of specification with the axiom schema of replacement. Appending this schema, as well as the axiom of regularity...
46 KB (6,252 words) - 14:45, 16 April 2025
Negation (redirect from Logical not)
In logic, negation, also called the logical not or logical complement, is an operation that takes a proposition P {\displaystyle P} to another proposition...
19 KB (2,236 words) - 02:31, 5 January 2025
The Winograd schema challenge (WSC) is a test of machine intelligence proposed in 2012 by Hector Levesque, a computer scientist at the University of Toronto...
18 KB (2,038 words) - 20:12, 29 April 2025
The interface to the UVC emulator (Logical Data Viewer) The definition of the logical data schema or LDS (the schema to read schemata) The convention must...
28 KB (4,104 words) - 16:46, 2 February 2025
fallacies—invalid argument forms involving logical errors. Rules of inference belong to logical systems, and distinct logical systems use different rules of inference...
66 KB (7,292 words) - 09:00, 19 April 2025
A conceptual schema or conceptual data model is a high-level description of informational needs underlying the design of a database. It typically includes...
6 KB (833 words) - 16:19, 22 August 2024
of the schema. The obvious advantage would be that search load for the large partitioned table can now be split across multiple servers (logical or physical)...
19 KB (2,053 words) - 17:24, 31 March 2025
Interpretation (logic) (redirect from Logical interpretation)
inductively using the T-schema, which is a definition of first-order semantics developed by Alfred Tarski. The T-schema interprets the logical connectives using...
32 KB (4,478 words) - 02:08, 3 May 2025
First-order logic (section Logical symbols)
a small number of rules of inference, along with several infinite schemas of logical axioms. It is common to have only modus ponens and universal generalization...
93 KB (13,068 words) - 10:43, 4 May 2025
Three-schema-architecture that separated an external schema, logical schema and internal schema. For Oracle's product line, the internal schema corresponded...
16 KB (2,012 words) - 10:05, 22 April 2025
logic, disjunction (also known as logical disjunction, logical or, logical addition, or inclusive disjunction) is a logical connective typically notated as...
16 KB (1,937 words) - 20:20, 25 April 2025
RDF Schema (Resource Description Framework Schema, variously abbreviated as RDFS, RDF(S), RDF-S, or RDF/S) is a set of classes with certain properties...
17 KB (1,750 words) - 04:21, 3 April 2025
In logic and mathematics, the logical biconditional, also known as material biconditional or equivalence or bidirectional implication or biimplication...
20 KB (1,794 words) - 12:02, 24 April 2025