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Tree-like structure for data
A hierarchical database model is a data model in which the data is organized into a tree-like structure. The data are stored as records which is a collection
Hierarchical_database_model
Type of data model
a database model is the relational model, which uses a table-based format. Common logical data models for databases include: Hierarchical database model
Database_model
Database model invented by Charles Bachman
before being widely replaced by relational databases in the 1980s. While the hierarchical database model structures data as a tree of records, with each
Network_model
Database management system
modeling, from about 1980 to 2005, the hierarchical database model was commonly used. Since 2000 or 2010, many NoSQL models that are non-relational, including
Multi-model_database
Topics referred to by the same term
classes Hierarchical database model, a tree-like database model Hierarchical query, an SQL query on a hierarchical database Hierarchical linear modeling, multi-level
Hierarchy_(disambiguation)
Organized collection of data in computing
for databases include: Navigational databases Hierarchical database model Network model Graph database Relational model Entity–relationship model Enhanced
Database
Statistical model written in multiple levels
Bayesian hierarchical modelling is a statistical model written in multiple levels (hierarchical form) that estimates the posterior distribution of model parameters
Bayesian hierarchical modeling
Bayesian_hierarchical_modeling
Digital database whose organization is based on the relational model of data
A relational database (RDB) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. A Relational Database Management System
Relational_database
Database using graph structures for queries
In the mid-1960s, navigational databases such as IBM's IMS supported tree-like structures in its hierarchical model, but the strict tree structure could
Graph_database
Database model
into relations. A database organized in terms of the relational model is a relational database. The purpose of the relational model is to provide a declarative
Relational_model
Model or diagram describing interrelated things
abstract data model, that defines a data or information structure that can be implemented in a database, typically a relational database. Entity–relationship
Entity–relationship_model
Technique used in relational databases
The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases. It is based on
Nested_set_model
functional database model is used to support analytics applications such as financial planning and performance management. The functional database model, or
Functional_database_model
Joint hierarchical database made by IBM
The IBM Information Management System (IMS) is a joint hierarchical database and information management system that supports transaction processing. Development
IBM Information Management System
IBM_Information_Management_System
Service that maps the names of network resources to their respective network addresses
getent. Access control list Directory Services Markup Language Hierarchical database model LDAP Data Interchange Format Metadirectory Service delivery platform
Directory_service
Overview of and topical guide to databases
relational model. Flat file database – various means to encode a database model (most commonly a table) as a single file. Hierarchical database model – data
Outline_of_databases
Network protocol supporting distributed directory information services
CCSO Nameserver Federated Naming Service Hesiod (name service) Hierarchical database model Key server (cryptographic) LDAP Application Program Interface
Lightweight Directory Access Protocol
Lightweight_Directory_Access_Protocol
A hierarchical query is a type of SQL query that handles hierarchical model data. These are useful for working with databases of graph-structured data
Hierarchical and recursive queries in SQL
Hierarchical_and_recursive_queries_in_SQL
Set of data elements in databases
In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name)
Table_(database)
Database in which records or objects are found by following references from other objects
access is traditionally associated with the network model and hierarchical model of database, and conventionally describes data manipulation APIs in which
Navigational_database
Partition of Earth's surface into subdivided cells
progressively finer resolution", forming a hierarchical grid, it is called a hierarchical DGG (sometimes "global hierarchical tessellation" or "DGG system"). Discrete
Discrete_global_grid
Relational database programming language
object–relational database management systems Comparison of relational database management systems Data warehouse Hierarchical database model List of NoSQL
SQL
Type of database that uses vectors to represent other data
use-case for vector databases is in retrieval-augmented generation (RAG), a method to improve domain-specific responses of large language models. The retrieval
Vector_database
hierarchical models there is no relationship between the size of the network and its average clustering coefficient. The development of hierarchical network
Hierarchical_network_model
Approximate nearest neighbor search algorithm
Hierarchical navigable small world (HNSW) is an algorithm for approximate nearest neighbor search. It is used to find items that are similar to a query
Hierarchical navigable small world
Hierarchical_navigable_small_world
Abstract model
to one another. Hierarchical model The hierarchical model is similar to the network model except that links in the hierarchical model form a tree structure
Data_model
Concept system
characteristics (properties). Besides object types, the terminology model allows defining hierarchical classifications, definitions for object type and property
Terminology_model
or technology companies. Most models use the relational model of database management, but some use the hierarchical model, especially those used in manufacturing
Industry_standard_data_model
Systematic organization of data
Data hierarchy refers to the systematic organization of data, often in hierarchical form. Data organization involves characters, fields, records, files
Data_hierarchy
Type of data model
of data model relates to the mathematical notion of a sparse matrix. EAV is also known as object–attribute–value model, vertical database model, and open
Entity–attribute–value_model
Level of database normalization
non-relational (or NoSQL) database, such as one using a hierarchical or document-oriented model, to a relational database. A database must satisfy 1NF to satisfy
First_normal_form
Database model
data model (SDM) is a high-level semantics-based database description and structuring formalism (database model) for databases. This database model is designed
Semantic_data_model
Statistical method in data analysis
statistics, hierarchical clustering (also called hierarchical cluster analysis or HCA) is a method of cluster analysis that seeks to build a hierarchy of clusters
Hierarchical_clustering
Relational database and fourth-generation language
the 1970s and 1980s. NOMAD supports both the relational and hierarchical database models. NOMAD provides both interactive and batch environments for data
NOMAD_(software)
Database management system
database, but with an object-oriented database model: objects, classes and inheritance are directly supported in database schemas and in the query language
Object–relational_database
Technique for modelling software architecture
decomposition (a hierarchical tree structure) of a system into containers and components and relies on existing modelling techniques such as Unified Modeling Language
C4_model
Data, information, knowledge, wisdom hierarchy
Metaphorical model of cognition and action by Chris Argyris Model of hierarchical complexity – Framework for scoring a behavior's complexity Maslow's hierarchy of
DIKW_pyramid
Type of data modeling language
into database designs for IBM's hierarchical database, IMS. Later models were transformed into database designs for Cullinet's network database, IDMS
IDEF1X
Computer document convention
image elements could be referenced with a hierarchical name that began with the root document object. A hierarchical name could make use of either the names
Document_Object_Model
Set of file formats
Hierarchical Data Format (HDF) is a set of file formats (HDF4, HDF5) designed to store and organize large amounts of data. Originally developed at the
Hierarchical_Data_Format
System to identify resources on a network
The Domain Name System (DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources
Domain_Name_System
Reference model for military vehicles
characterized by a generic control node at all the hierarchical control levels. The 4D/RCS hierarchical levels are scalable to facilitate systems of any
4D-RCS Reference Model Architecture
4D-RCS_Reference_Model_Architecture
Software design pattern
and only one model. The MVC pattern subsequently evolved, giving rise to variants such as hierarchical model–view–controller (HMVC), model–view–adapter
Model–view–controller
property Hierarchy (mathematics) Nested set model for storing hierarchical information in relational databases B. Korte and J. Vygen (2012). Combinatorial
Nested_set_collection
Extended version of the Entity-Relationship model for database design
Enhanced Entity–Relationship (EER) model is an extended version of the Entity–Relationship (ER) model used in database design. It incorporates additional
Enhanced entity–relationship model
Enhanced_entity–relationship_model
terminology model compliant, several conceptual extensions are supported as set relations, multilingual attributes, weak-typed collections or hierarchical enumerations
Odaba
Type of machine learning model
A large language model (LLM) is an AI model (typically a neural network) trained on a vast amount of text for natural language processing tasks, especially
Large_language_model
Society of Japan from 1603 to 1868
Taika Reforms in 645 AD, initiating the Ritsuryō legal system that was modeled from Chinese Tang dynasty legal code. The reforms were following a major
Edo_society
Creating a model of the data in a system
conceptual model is then translated into a logical data model, which documents structures of the data that can be implemented in databases. Implementation
Data_modeling
Reference model for network communication
RFC 1142. Government Open Systems Interconnection Profile Hierarchical internetworking model History of the Internet Layer 8 List of information technology
OSI_model
English computer scientist
Initially, IBM refused to implement the relational model to preserve revenue from IMS/DB, a hierarchical database the company promoted in the 1970s. Codd then
Edgar_F._Codd
ethnic groups were analyzed and made publicly available. EggNOG Database: a hierarchical, functionally and phylogenetically annotated orthology resource
List_of_biological_databases
Database class for storage and retrieval of modeled data
general concept of NoSQL databases. Strozzi suggests that, because the current NoSQL movement "departs from the relational model altogether, it should therefore
NoSQL
Database presenting data in XML formats
XML databases are especially tailored for working with XML data. As managing XML as large strings would be inefficient, and due to the hierarchical nature
XML_database
Database management system
modes (on-disk, in-memory, and combined) database models (relational, object-oriented, entity–attribute–value model, network/CODASYL) target markets The term
Embedded_database
Representation of an organization's data
A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product
Logical_schema
Online knowledge base (2007–2016)
structure was non-hierarchical, Freebase could model much more complex relationships between individual elements than a conventional database[citation needed]
Freebase_(database)
Method of media consumption
use of the database as the model for this kind of consumption, and others find that Azuma presents no precise description of how this database comes into
Database_consumption
Representation of a data design
physical data model (or database design) is a representation of a data design as implemented, or intended to be implemented, in a database management system
Physical_schema
Processing mode
execution time. They borrow aspects of navigational databases, hierarchical databases and relational databases. OLAP is typically contrasted to OLTP (online
Online_analytical_processing
Database designed to store chemical information
Chemicals in the databases may be clustered into groups of 'similar' molecules based on similarities. Both hierarchical and non-hierarchical clustering approaches
Chemical_database
objects that are hierarchical in design, similar to XML, JSON or serialized PHP. It is this hierarchical object that separates object databases from their relational
ObjectDatabase++
ROLAP) logical model of OLAP cubes in JSON or provided from external sources hierarchical dimensions (attributes that have hierarchical dependencies, such
Cubes_(OLAP_server)
Function of managing and maintaining DBMS software
Distributed database management system Hierarchical model Navigational database Network model Object model Object database (OODBMS) Object–relational database (ORDBMS)
Database_administration
Approach to library cataloging
between the entities provide links to navigate through the hierarchy of relationships. The model is significant because it is separate from specific cataloguing
Functional Requirements for Bibliographic Records
Functional_Requirements_for_Bibliographic_Records
System Dynamics is used for modelling and simulating large hierarchical models with multidimensional variables. The models are created in a traditional
Simantics_System_Dynamics
Overview of and topical guide to machine learning
Boosting SPRINT Bayesian networks Naive Bayes Hidden Markov models Hierarchical hidden Markov model Bayesian statistics Bayesian knowledge base Naive Bayes
Outline_of_machine_learning
Hierarchy of classes of formal grammars
(set inclusive). The general idea of a hierarchy of grammars was first described by Noam Chomsky in "Three models for the description of language" during
Chomsky_hierarchy
Relational model database server
data management products, including database servers, developed by IBM. It initially supported the relational model, but was extended to support object–relational
IBM_Db2
data modeling software developed by IDERA, Inc. ER/Studio is compatible with multiple database platforms and is used to create and manage database designs
ER/Studio
logical flow of the model. Data for the model resides in the parameters of the blocks and in a proprietary database. New blocks can be created by combining
ExtendSim
Type of computer program
Machine-readable document Multi-model database NoSQL Object database Online database Real-time database Relational database Content management system Key-value
Document-oriented_database
Free and open-source database management system
database management systems (RDBMS). The data model consists of several hierarchical components: A keyspace in Cassandra is analogous to a database in
Apache_Cassandra
Set of conceptual and technical difficulties
domain-driven object models. Relational Database Management Systems (RDBMS) is the standard method for storing data in a dedicated database, while object-oriented
Object–relational impedance mismatch
Object–relational_impedance_mismatch
Data modeling concept
areas.[citation needed] Dimensional modeling does not necessarily involve a relational database. The same modeling approach, at the logical level, can
Dimensional_modeling
Internal representation of world by AI
Keiko (August 2026). "Brain-AI convergence: Generative world models and hierarchical attention for human intelligence". Patterns. 7 (8) 101593. doi:10
World model (artificial intelligence)
World_model_(artificial_intelligence)
Group of people who carry out orders based on the authority of others within the group
[citation needed] In this model, social capital is viewed as being mobilized in response to orders that move through the hierarchy leading to the phrase "command
Command_hierarchy
Type of large language model
A generative pre-trained transformer (GPT) is a type of large language model (LLM) that is widely used in generative artificial intelligence chatbots
Generative pre-trained transformer
Generative_pre-trained_transformer
File system prioritizing associative access
location, as with hierarchical file systems. It allows the data to be addressed by their content (associative access). Traditional hierarchical file-systems
Semantic_file_system
Computing system architecture
data management functions, such as in the case of Cisco's hierarchical internetworking model. Other tiers of separation may include the service layer,
Multitier_architecture
Class of artificial neural network
proof of stability. Hierarchical recurrent neural networks (HRNN) connect their neurons in various ways to decompose hierarchical behavior into useful
Recurrent_neural_network
Language model application development framework
web pages, CSV files and relational databases, while making it easier for developers to change the underlying model without major code changes. As of March
LangChain
Density-based data clustering algorithm
of the original decisions such as the border points, and produces a hierarchical instead of a flat result. In 1972, Robert F. Ling published a closely
DBSCAN
Image classification model
Bayes model and hierarchical Bayesian models are discussed. The simplest one is Naive Bayes classifier. Using the language of graphical models, the Naive
Bag-of-words model in computer vision
Bag-of-words_model_in_computer_vision
Declarative graph query language
relational database model) in mind, but Cypher was based on the components and needs of a database built upon the concepts of graph theory. In a graph model, data
Cypher_(query_language)
concepts defined in a terminology model. Compared with object-oriented databases, the terminology-oriented database requires some minor conceptual extensions
Terminology-oriented_database
Personality model consisting of five broad dimensions
personality trait model or five-factor model (FFM), sometimes called by the mnemonic acronym OCEAN or CANOE, is a scientific model for measuring and describing
Big_Five_personality_traits
API standard for rendering 3D computer graphics
PHIGS (Programmer's Hierarchical Interactive Graphics System) is an application programming interface (API) standard for rendering 3D computer graphics
PHIGS
Clustering using tree-based data aggregation
iterative reducing and clustering using hierarchies) is an unsupervised data mining algorithm used to perform hierarchical clustering over particularly large
BIRCH
Order of execution of transactions in transaction processing
the fields of databases and transaction processing (transaction management), a schedule (or history) of a system is an abstract model to describe the
Database_transaction_schedule
Database of biological information
databases are available for some species, mainly those that are often used in research (model organisms). For example, EcoCyc is an E. coli database.
Biological_database
Expression of a function as the composition of two functions
system is intrinsically hierarchical, the joint distribution on system variables should provide evidence of this hierarchical structure. The task of an
Functional_decomposition
Data organized by tags but not tables
Metadata Parameters for ONNX Models". Oracle AI Vector Search User's Guide. Randel (July 5, 2016). "How to deal with hierarchical / nested data in machine
Semi-structured_data
Database of data representing objects in geometric space
(point, line, polygon, etc.) based on the vector data model. The datatypes in most spatial databases are based on the OGC Simple Features specification for
Spatial_database
Computing system for indivisible operations
application. Databases for transaction processing may be constructed using hierarchical, network, or relational structures. Hierarchical structure: organizes
Transaction_processing_system
Computer programming library
Terminfo is a library and database that enables programs to use display terminals in a device-independent manner. Mary Ann Horton implemented the first
Terminfo
Software
Weizmann Institute of Science, who was the first to develop the concept of hierarchical, parallel, and broadcasting statecharts. In 2006, I-Logix's shareholders
Rhapsody_(modeling)
Collection of bioinformatics databases
metagenome data. Another database that supplements KEGG PATHWAY is the KEGG BRITE database. It is an ontology database containing hierarchical classifications
KEGG
Branch of machine learning
on hierarchical generative models and deep belief networks, may be closer to biological reality. In this respect, generative neural network models have
Deep_learning
Hierarchical database
Enscribe is the native hierarchical database in the commercial HP NonStop (Tandem) servers. It is designed for fault tolerance and scalability and is
Enscribe
travel, tourism, insurance
HIERARCHICAL DATABASE-MODEL
HIERARCHICAL DATABASE-MODEL
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