• 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
  • Thumbnail for Snowflake schema
    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
  • Thumbnail for Physical schema
    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
  • 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
  • Thumbnail for Database schema
    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
  • Thumbnail for Data modeling
    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
  • 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
  • Thumbnail for Image schema
    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
  • 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
  • Thumbnail for Negation
    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
  • Thumbnail for Rule of inference
    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
  • 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
  • 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
  • Thumbnail for Logical disjunction
    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
  • Thumbnail for Logical biconditional
    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