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| | Data model - Wikipedia, the free encyclopedia |
 | | A data model is a model that describes in an abstract way how data is represented in a business organization, an information system or a database management system. | | | For example in the relational model all data is represented by mathematical relations (or, to be precise, a slightly generalized version thereof). | | | While simple data models consisting of few tables or objects can be created "manually", large applications need a more systematic approach. |
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http://en.wikipedia.org/wiki/Data_model
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| | VSO Data Model: Version 1.8 |
| | For the VSO Data Model the bounding circle is to be understood as either the maximum inscribed circle in the bounding data rectangle (polygon), or the minimum circumscribed circle, depending on whether the query is for included data (presumably the normal default) or excluded data, respectively. | | | For example, an archive of data all taken at the same wavelength is unlikely to have wavelength as a searchable key in its database, but could (and should) supply that wavelength as a fixed value in its data description to avoid inappropriate satisfaction of client queries. | | | Some data providers may be virtual, that is the query (but not the archive and distribution) services may be handled by other servers with access to their database information as proxies. |
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http://vso.stanford.edu/datamodel/v18.html
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| | Data Modeling 101 |
| | Although you wouldn’t think it, data modeling can be one of the most challenging tasks that an Agile DBA can be involved with on an agile software development project. | | | The goals of this article are to overview fundamental data modeling skills that all developers should have, skills that can be applied on both traditional projects that take a serial approach to agile projects that take an evolutionary approach. | | | Your approach to data modeling will often be at the center of any controversy between the agile software developers and the traditional data professionals within your organization. |
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http://www.agiledata.org/essays/dataModeling101.html#Notations
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| | TDAN Hay - Data Model Views |
| | A data model (specifically, an "entity/relationship" model) has two purposes: first, a systems analyst uses it to confirm with prospective system users that he or she understands the nature of the business involved; second, a system designer uses it as the blueprint for the underlying structure of a new or revised system. | | | The data model is a drawing — intended to represent the business in its most fundamental sense — showing entities as "things of significance about which an organization wishes to hold information". | | | Early relational data base management systems were slow, even with the tools available for logical tuning, so table structures were de-normalized and departed from the conceptual model. |
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http://www.tdan.com/i012ht01.htm
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| | Data Model Dictionary |
| | The ProcessAnalyst model describes the computations of data (or value) within a system without regards to when and why the values are computed. | | | Conceptual Data Model (CDM) - A CDM represents the overall logical structure of a database, which is independent of any software or data storage structure. | | | View - Data structure that results from an SQL query and that is built from data in one or more tables. |
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http://www.datamodel.org/DataModelDictionary.html
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| | The XML data model |
| | The data that is encoded in an XML document may or may not have embedded newlines. | | | Since all the other nodes have delimiters to distinguish them, data nodes don't need them: everything that is not between `< and `>' is data. | | | The main structure of an XML document is tree-like, and most of the lexical structure is devoted to defining that tree, but there is also a way to make connections between arbitrary nodes in a tree. |
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http://www.w3.org/XML/Datamodel.html
(1371 words)
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| | XQuery 1.0 and XPath 2.0 Data Model (XDM) |
| | The data model can represent various values including not only the input and the output of a stylesheet or query, but all values of expressions used during the intermediate calculations. | | | The data model cannot support environments where different types with the same expanded-QName are available. | | | The data model is based on the [Infoset] (henceforth "Infoset"), but it requires the following new features to meet the [XPath 2.0 Requirements] and [XML Query Requirements]: |
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http://www.w3.org/TR/xpath-datamodel
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| | Abstract Data Models [Win64] |
| | Basic data types remain 32 bits in length, so there is no change in the size of data on the disk, data shared over a network, or data shared through memory-mapped files. | | | These new data types have been added to the Windows API header files. | | | Defining the data model does not make this task easier. |
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http://msdn.microsoft.com/library/en-us/win64/win64/abstract_data_models.asp
(375 words)
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| | Developing with Core Data |
| | In order to be properly managed, a data object needs to be associated with its managed object context and an entity definition that is part of the managed object model that is being implemented by the context. | | | And, since every application has some sort of data model, this was a problem that every developer had to solve independently. | | | It allows Core Data to efficiently optimize the objects that are loaded into memory and leave unused data on disk. |
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http://developer.apple.com/macosx/coredata.html
(2423 words)
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| | Data Models |
| | When SQL is generated from a data model, the primary emphasis is on the DDL statements that define the database schema and to a lesser extent the DCL statements that handle privileges. | | | Logical data models are used to organize and understand information structure. | | | To be more precise, entity and attribute usually refer to the logical data model, while table and column refer to the physical SQL code. |
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http://www.excelsoftware.com/richdatamodel.html
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| | WinFS Data Model |
| | These classes are known as data classes, for example, Service, FullName, etc. In Longhorn there are 28 schemas with their corresponding data classes in the WinFS API. | | | The main component of this relational data access API is the T-SQL language holding possibilities to make queries in a SQL based manner over the WinFS store. | | | The existence of data classes reflects the object-oriented approach in the WinFS philosophy. |
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http://www.c-sharpcorner.com/Longhorn/WinFS/WinFSDataModel.asp
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| | The CLEO Data Model Home Page |
| | The separation of data analysers from data providers has the additional benefit of allowing simple standalone tools to be constructed, since they look at data though the same interfaces. | | | A good data model also decouples higher level functions at the user level from lower level systems providing data. | | | Conversely, necessary changes made to the data format are not visible at the user analysis level. |
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http://www.phys.ufl.edu/hee/cleo/datamodel/datamodel.html
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| | Topic Maps — Data Model |
| | The purpose of the data model is to define the interpretation of the Topic Maps interchange syntaxes, and to serve as a foundation for the definition of supporting standards for canonicalization, querying, constraints, and so on. | | | Topic maps may be represented in many ways: using Topic Maps syntaxes in files, inside databases, as internal data structures in running programs, and even mentally in the minds of humans. | | | All datatypes used shall have a string representation of their value space and this string representation is what is stored in the topic map. |
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http://www.isotopicmaps.org/sam/sam-model
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| | XML.com: A Data Model for Strongly Typed XML |
| | For instance, the data model has to be able to represent the results of queries that return atomic values such as | | | PSVI information such as notation data, default information, and identity constraint relationships are not represented in the XQuery and XPath 2.0 data model. | | | To satisfy the unique needs of XML query processing, the data model is capable of representing XML documents that are not well-formed. |
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http://www.xml.com/pub/a/2002/12/19/datamodel.html
(1987 words)
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| | Model Business Data |
| | Data analysts, system analysts, system designers, database analysts and business managers have to work together to create a data model. | | | Entity-Relationship diagrams describe the data and the business relationships among the data independent of any implementation approach, technology, hardware or software. | | | Business data is any information that an organization needs to function. |
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http://www.requirementssolutions.com/Business_Data_Modeling.html
(767 words)
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| | About Arc Marine, the ArcGIS Marine Data Model |
| | For users, an ArcGIS data model provides a basic template for implementing GIS projects (i.e., inputting, formatting, geoprocessing, and sharing data, creating maps, performing analyses, etc.); for developers, it provides a basic framework for writing program code and maintaining applications. | | | A key advantage of the data model is that it should help users to take fuller advantage of the most advanced manipulation and analysis capabilities of ArcGIS, particularly its support of more complex rules that can be built into its geodatabases, and of objects with not only attributes, but database rules (rudimentary behavior). | | | The model also considers how marine and coastal data might be more effectively integrated in 3-D space and time. |
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http://dusk2.geo.orst.edu/djl/arcgis/about.html
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| | Dimensions Data Model |
| | The Dimensions Data Model is a data storage architecture that separates data storage and handling from the rest of the survey research process. | | | Traditionally, only a limited range of tools have been able to access the files generated by market research software, and these files needed to be passed from one person to the next as the survey progressed. | | | Access data using any software, whether you are using custom technologies, SPSS technologies, or products from other providers |
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http://www.spss.com/data_model
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| | Windows Database Service: Introduction to Data Modeling |
| | This document is an informal introduction to data modeling using the Entity-Relationship (ER) approach. | | | The document is a practical guide, not an academic paper on either relational database design or data modeling. | | | Send computing questions to the ITS Help Desk or call (512) 475-9400. |
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http://www.utexas.edu/its/windows/database/datamodeling
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| | ColabWiki: Data Reference Model |
| | Developed a Data Reference Model Success Strategy that seeks to deftly evolve to the "steady-state" dynamics envisioned for mature DRM governance in which critical agency mission needs for data-sharing and interoperability can be met. | | | The Data Reference Model (DRM), and the open process employed to evolve it, will contribute to this vital aspect of advancing information sharing. | | | The Architecture and Infrastructure Committee (AIC) established an interagency collaborative working group to develop the next version of the Federal Enterprise Architecture Data Reference Model and associated implementation guidelines. |
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http://colab.cim3.net/cgi-bin/wiki.pl?DataReferenceModel
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| | Paleoclimate data and model comparisons |
| | We use a classification in which the 'macroclimate' of the present-day land surface is expressed in terms of ten major biomes. | | | Such polar discrepancies are common to other warm interval data/model comparisons, and fully resolving them remains a fundamental problem in paleoclimatology. | | | Permian climates: evaluating model predictions using global paleobotanical data |
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http://pgap.uchicago.edu/data-models.html
(889 words)
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| | Model data centers |
| | Data Center Best Practices: Optimizing Server infrastructure with OS Portability | | | The common challenges rest in data quality management, protection, categorization and storage but there are evolving solutions. | | | Preparing for Business Intelligence Success - Sybase, HP and Intel |
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http://www.networkworld.com/weblogs/datacenter/008671.html
(661 words)
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| | Lazysoft, home of the Associative Model of Data |
| | Sentences™ is a development environment and database management system based on the innovative Associative Model of Data. | | | Alongside Sentences, LazyView™ lets users aggregate and view information from disparate databases (Oracle, SQL Server etc) in real-time, without moving data and without costly data warehousing and ETL tools. | | | It dramatically reduces development timescales, and enables real-time aggregation of data held within legacy systems. |
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http://www.lazysoft.com
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| | JMCDM |
| | JMCDM is a logical data model that integrates the geophysical data requirements of all DoD components. | | | JMCDM and its supporting encyclopedia will serve as input for the expansion of the DoD Data Model. | | | To expedite the expansion of the DoD Enterprise Data Model in the area of Meteorology and Oceanography (METOC), the METOC FDAd is developing the Joint METOC Conceptual Data Model (JMCDM). |
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http://pao.cnmoc.navy.mil/scripts/public_JMCDM/home_pwd.pl
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| | Unisys Weather |
| | All the images are generated using the Weather Processor (WXP) analysis package which is available from Unisys. | | | For the novice user, there are detailed explanation pages to guide them through the various plots, charts and images. | | | The graphics and data are displayed as a meteorologist would expect to see. |
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http://weather.unisys.com
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| | Global Justice XML Data Model |
| | Also included are the most current enumeration type schemas (code tables) and their proxy schemas. | | | We recommend you read the SSGT instruction page before you use this tool for the first time. | | | Includes information on past and future versions of the data model; data model software tools and capabilities; training and support. |
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http://it.ojp.gov/jxdm
(511 words)
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| | ScienceDaily: New Observations And Climate Model Data |
| | The computer models analyzed in the Livermore study show that in the deep tropics, temperature changes in the troposphere are larger than at the surface. | | | The discrepancy in tropical temperature trends has been used to cast doubt on the reliability of computer models, and on their usefulness for predicting future climate changes. | | | Statistics for Experimenters: An Introduction to Design, Data Analysis, and Model Building |
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http://www.sciencedaily.com/releases/2005/08/050814164823.htm
(1844 words)
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| | Health Data Model - Introduction |
| | The first meeting of the Health Geodatabase Modeling Task Force convened in Santa Barbara, California under the direction Michael Goodchild, PhD, Professor of Geography at the University of California at Santa Barbara. | | | The goal is to develop an “essential” geodatabase model—not a comprehensive model. | | | The current thinking is to use partners and end users to develop and extend the model (to make it specialized). |
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http://www.ncgia.ucsb.edu/projects/health/sb2003/notes.html
(177 words)
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| | USGS (U.S. Geological Survey) EROS, Sioux Falls, SD |
| | Detailed information on the characteristics of GTOPO30 including the data distribution format, the data sources, production methods, accuracy, and hints for users, is found in the GTOPO30 | | | GTOPO30 was derived from several raster and vector sources of topographic information. | | | GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). |
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http://edc.usgs.gov/products/elevation/gtopo30/gtopo30.html
(266 words)
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| | Standard data model - Wikipedia, the free encyclopedia |
| | See also: standard object model, standard document object model | | | A standard data model is a data model that is widely applied in some industry, and shared amongst competitors to some degree. | | | They are often defined by database vendors or operating system vendors and thus used by default whether suitable for a given purpose or not. |
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http://en.wikipedia.org/wiki/Standard_data_model
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| | D0 Run II Data Model |
| | Reports and example code from Lakos and Edwards (C++ Large Scale Programing experts) | | | Understand the interface of the Event class to the persistency mechanism. | | | It is released with the code together under the same name package (edm). |
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http://www-d0.fnal.gov/software/data_model/data_model.html
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| | Data Model |
| | Data model enhancements to address limitations of the legacy IBS Portal database design. | | | DotNetNuke® is copyright 2002-2006 by Perpetual Motion Interactive Systems Inc. | | | Call center support 24/7/365 for your DotNetNuke application: telephone answering service, hosting, live chat, support for end-users. |
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http://www.dotnetnuke.com/LinkClick.aspx?link=631&mid=1534
(105 words)
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| | Model Analyses and Forecasts |
| | More information is available in the Product Description Document | | | To view model images, click on the desired image resolutions in the table below. | | | NCEP Home > NCEP Central Operations > Production Management Branch > Model Analyses and Forecasts |
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http://www.nco.ncep.noaa.gov/pmb/nwprod/analysis
(68 words)
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| | ESRI Support Center Home |
| | Labels disappear when clipping data frame with a graphic | | | Duplicate subclass names change from lowercase to upper case when using the Geodatabase to Coverage tool |
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http://support.esri.com
(324 words)
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