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Topic: Data access


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In the News (Thu 16 Feb 12)

  
  Design Patterns: Data Access Object
Note that the SQL to access the Cloudscape database is hard-coded.
This approach separates the data access interface from the details of how it is implemented, providing the benefits of the DAO pattern.
The data access mechanism can be changed easily by writing a new class that implements the same interface, and changing client code to use the new class.
java.sun.com /blueprints/patterns/DAO.html   (1335 words)

  
 Visual Studio Data Access choices – Whidbey release   (Site not responding. Last check: 2007-10-23)
Breaking down the boundaries between these differing data models so that developers are able to provide layers of abstraction that suit their application needs is a primary goal of the data access support in “Whidbey”.
Data access is no longer simply confined to the relational table and row model, but is also exposed as objects and XML.
The W3C XQuery language is used to query the data as XML and schemas are used to shape the data.
www.gotdotnet.com /team/mfussell/DataAccessinWhidbey.htm   (2546 words)

  
 Core J2EE Patterns - Data Access Object
Access to persistent storage, such as to a database, varies greatly depending on the type of storage (relational databases, object-oriented databases, flat files, and so forth) and the vendor implementation.
Applications that need to access data from a legacy or disparate system (such as a mainframe, or B2B service) are often required to use APIs that may be proprietary.
Because all data access operations are now delegated to the DAOs, the separate data access layer can be viewed as the layer that can isolate the rest of the application from the data access implementation.
java.sun.com /blueprints/corej2eepatterns/Patterns/DataAccessObject.html   (2848 words)

  
 Perspectives on grid: Improving data access performance   (Site not responding. Last check: 2007-10-23)
Data transformation may not seem like a core technology, but it is vitally important to providing true virtualization of underlying data sources.
Data transformation is the process of aligning and consolidating information from multiple systems and enriching the information to make it useful for new applications.
Partitioning data according to some scheme or layout is an architectural approach to improving overall system throughput and performance that has been used for a long time and is applicable to distributed grids.
www.ibm.com /developerworks/grid/library/gr-access/index.html?ca=drs-   (2816 words)

  
 Data Access
Access to private data requires approval by the NIH Privacy Act Officer and is currently only available on DB2.
To request Oracle access to NED public data, submit the Request Form for Oracle Access to NED Data.
Access to this data requires approval by the NIH Privacy Act Officer.
nedinfo.nih.gov /accessing_NED.htm   (410 words)

  
 AAVSO: AAVSO Section
The AAVSO data are used extensively to correlate multi-wavelength observations of variable stars, scheduling ground-based and satellite observations, and for analysis of stellar behavior.
If you are looking for variable star data for research purposes or simply to see what a particular variable is doing at a given time, accessing the wealth of information contained within the AAVSO International Database is free of charge via several channels.
Software for data entry, data analyis, and for predicting the dates of minima of eclipsing binary stars is also available.
www.aavso.org /data   (177 words)

  
 Data Access Tools from the Census Bureau
DataFerrett is a tool and data librarian that searches and retrieves data across federal, state, and local surveys, executes customized variable recoding, creates complex tabulations and business graphics.
CES and the RDCs provide access to researchers, federal agencies, and other institutions to non-publicly available Census Bureau data files.
On The Map: A mapping application that describes the characteristics and geographical distribution of workers and employers in particular area of town, county, or region of your state.
www.census.gov /main/www/access.html   (432 words)

  
 Data Access & Management   (Site not responding. Last check: 2007-10-23)
The AST library may be used for attaching world coordinate systems to astronomical data, for retrieving and interpreting that information and for generating graphical output based on it.
Data objects are dynamic in the sense that programs can add, modify, or delete components to or from a tree.
It is of most interest to astronomers who write their own software and require uncomplicated access to their image data.
star-www.rl.ac.uk /star/dvi/sun1.htx/node26.html   (1828 words)

  
 TAF Data Access
Forecasts may be duplicated within the files and multiple forecasts received from a station may appear in a file.
Reports may be duplicated within the files and multiple reports received from a station may appear in a file.
Data files are available for the past 4 observing cycles and are identified by cycle.
weather.noaa.gov /weather/taf.shtml   (513 words)

  
 Data Access
The state of New York has recently adopted a new law to guarantee public access to scientific data state agencies have used as the basis of new rules and regulations.
In compliance with the Data Access Act, OMB issued a proposed rule to revise Circular A-110 and requested public comments in the Federal Register on February 4, 1999 (64 Fed.
Because the statuory language for Data Access and the subsequently proposed OMB rule for its implementation are succint, a number of significant issues will have to be resolved during the comment period to flesh out both the OMB and subsequent agency regulations.
www.thecre.com /access/index.html   (1521 words)

  
 MODIS Data Access Methods   (Site not responding. Last check: 2007-10-23)
Data Pool uses a large (i.e., many Terabytes) disk cache to hold MODIS and AIRS data after initial insertion into the ECS archive for an extended period of time (e.g., a month or more).
The goal for the Data Pool is to increase the distribution capacity of the ECS by significantly reducing the need to access the tape archive.
In addition, user access to these data is made faster and easier.
daac.gsfc.nasa.gov /MODIS/data_access.shtml   (521 words)

  
 NDWFS Data Access
Data products for the third data release (DR3) of the NOAO Deep Wide-Field Survey will be available starting October 22, 2004.
Data products from version 2 of the first data release (DR1_02) of the NOAO Deep Wide-Field Survey have been superceded by our third data release above.
This can be used to display image data from a survey field, with interactive zoom and pan capabilities up to the full resolution of the field.
archive.noao.edu /ndwfs   (474 words)

  
 Data Access Object
Although this API provides everything a developer needs to access data and to persist application state, it is a cumbersome API to develop against - which makes a code generator particularly useful.
It is important to note that Data Access Object does not just apply to simple mappings of one object to one relational table, but also allows complex queries to be performed and allows for stored procedures and database views to be mapped into Java data structures.
CodeFutures' objective is to minimize the importance of the main argument against using Data Access Objects: the fact that it requires a significant amount of repetitive source code to be produced for no immediate advantage over using JDBC, EJB, or JDO directly.
www.codefutures.com /data-access-object   (849 words)

  
 alphaWorks : Web Data Access Developer : Overview
The Web Data Access Developer provides a single package, based on the Eclipse framework, that bundles both a development environment and a run-time environment.
The Web Data Access Developer is an end-to-end solution that results in a simpler and less expensive development and deployment tool for form-based data access clients.
The doctor or nurse retrieves the patient's data from within the examination room, takes the patient's medical history, and updates the patient record at the end of the exam.
www.alphaworks.ibm.com /tech/webdev?open&S_TACT=105AGX59&S_CMP=GR&ca=dgr-jw17awwebdev   (504 words)

  
 Live Access Server   (Site not responding. Last check: 2007-10-23)
It can present distributed data sets as a unified virtual data base through the use of DODS networking.
It is especially well-suited to groups of data producers with related data sets at distributed locations: a community modeling effort for example.
LAS is configurable with respect to the structure of data sets; the style of output graphics; the appearance of the interface; the level of user access provided (who can request what); and security (who can access the server).
ferret.pmel.noaa.gov /Ferret/LAS/ferret_LAS.html   (273 words)

  
 Data Access
Data Control for Btrieve is a specialized control for Btrieve access.
This object-oriented connection to client/server data provides a C++ class library that encapsulates the ODBC API for object-oriented database-independent applications development.
Intersolv DataDirect ODBC Pack, a component of Virtual Data Warehousing solution, is a suite of ODBC drivers that connect ODBC-compliant applications across multiple platforms to all major databases and gateways.
www.mpassociates.gr /software/catalog/prog/dataccess.html   (5068 words)

  
 patterns & practices: Data Access Application Block & Guide: Workspace Home
It focuses on a range of common data access tasks and scenarios and presents guidance to help you choose the most appropriate approaches and techniques.
The Data Access Application Block for.NET encapsulates performance and resource management best practices and can easily be used as a building block in your own.NET application.
The Data Access Application Block has been significantly enhanced and is now a part of Enterprise Library.
www.gotdotnet.com /Community/Workspaces/workspace.aspx?id=c20d12b0-af52-402b-9b7c-aaeb21d1f431   (331 words)

  
 Langley Atmospheric Science Data Center - Data Access
Searches can be done by project, parameter, and data set, and it can be refined by selecting a geographic region or time range.
The Langley Data Center requests a reprint of any published papers or reports or a brief description of other uses (e.g., posters, oral presentations, etc.) of data that we have distributed.
To assist the Langley Data Center in providing the best service to the scientific community, we request notification if you transmit these data to other researchers.
eosweb.larc.nasa.gov /HPDOCS/access_data.html   (476 words)

  
 DATA ACCESS   (Site not responding. Last check: 2007-10-23)
Data access is the heart of any real-world application, and ASP.NET provides a rich set of controls that are well-integrated with the managed data access APIs provided in the common language runtime.
Data Access and Customization Introduction to Templated Controls Handling Postbacks from a Template Using Select and Edit Templates Finding a Control Inside a Template Section Summary ------------------------------------------...
ASP.NET includes data access tools that make it easier than ever for you to design sites that allow your users to interact with databases through Web pages.
www.tecnet.pt /dotnet/7024.html   (371 words)

  
 GHRSST-PP: Data Access
L2P data are ideal as input to data assimilation systems and SST analysis systems as they preserve the original SST values but provide additional uncertainty estimates and a suite of ancillary data to aid interpretation of the SST observations themselves.
Data are generated at both Regional Data Assembly Centres (RDAC) sites and at a single Global Data Analysis Centre (GDAC) located at the NASA PO.DAAC.
In the coming months, all GHRSST-PP data will be served by the JPL GDAC with a mirror GDAC located in Europe as part of the European Commission MERSEA project.
ghrsst-pp.metoffice.com /pages/data_access/index.htm   (484 words)

  
 Inforamtion Resources > Data Access - Resources for Environmental Information   (Site not responding. Last check: 2007-10-23)
EPA Environmental Data Registry (EDR): The Environmental Data Registry (EDR) is a comprehensive, authoritative reference for information about the definition, source, and uses of environmental data.
Multi-Resolution Land Characteristics Consortium (MRLC) Data: Access to land use and land cover information cooperatively developed by cooperating federal agencies.
STORET: EPA repository for water quality, biological, and physical data and is used by state environmental agencies, EPA and other federal agencies, universities, private citizens, and many others.
www.epa.gov /region02/infores/dataaccess.htm   (429 words)

  
 Crystal Reports Features: Data Access
Access virtually any data with native, ODBC, OLE DB, and JDBC connectivity to relational, OLAP, XML, legacy, and enterprise data sources, including Oracle, IBM DB2, Sybase, Microsoft SQL Server, and Informix.
Access user-defined (in-memory) application data by connecting to JavaBeans, ADO.NET, and COM Data Providers.
Connect to a unique data source or combine multiple data sources in one report.
www.businessobjects.com /products/reporting/crystalreports/dataaccess.asp   (236 words)

  
 EPA AirData - Access to Air Pollution Data
The Monitor Data Queries section of the AirData Web site has more detailed descriptions of air monitors, and annual summary data for more pollutants and years than standard AirData reports and maps.
Monitor Data Queries uses data extracted from the AQS database.
About AirData describes the kinds of air pollution data included in AirData reports and maps, and the EPA databases from which we obtain the data.
www.epa.gov /air/data/index.html   (432 words)

  
 Easysoft Data Access
ODBC access to databases for which you cannot obtain an ODBC driver on your client platform.
ODBC access from Windows applications such as Excel, Access and Lotus 1-2-3 to RMS data on OpenVMS.
ODBC access to Sybase from Linux and Unix.
www.easysoft.com /products/data_access/index.html   (597 words)

  
 Data Access blog
Comments on this blogs.msdn/com/dataaccess blog will be closed, but we have re-published this blog's June and July posts over to the new blog, so you can comment there if you like.
In the context of the vision for data programmability and ADO.NET, we decided that the next big step for ADO.NET was to move to a higher-level of abstraction.
This first part focuses on an introduction to data structures, defining what data structures are, how the efficiency of data structures are analyzed, and why this analysis is important.
blogs.msdn.com /dataaccess/default.aspx   (2827 words)

  
 Know Dot Net - Data Access
I think that Deklarit and LLBLGenPro are two of the finest on the market, but I have to admit that I've also taken a liking to NJDX quite a bit.
The subject of the Microsoft Data Access Application Block comes up frequently in many different contexts in some of the newsgroups I frequent.
This article discusses the use of a data access class that I wrote many months ago and use daily in every application I develop.
www.knowdotnet.com /dataaccess.html   (756 words)

  
 Start > Quickstart Developer Tasks > Performing Data Access   (Site not responding. Last check: 2007-10-23)
The data is rendered five rows at a time and prevents the browser from becoming unresponsive if the control contains large amount of data.
This control sends data with the first request so that the client data source can consume it without the need to call back to the server.
This applies to all forms of data; for example, profile data can be sent to the client.
atlas.asp.net /quickstart/atlas/doc/data/default.aspx   (954 words)

  
 2MASS Data Access
Users are encouraged to first familiarize themselves with the Explanatory Supplement for the All-Sky Data Release.
Note: The All-Sky Data Release supercedes the Second Incremental Data Release.
On-line access to the 2MASS Point Source Catalogs (Second Incremental Release) through the Centre de Donnees astronomiques de Strasbourg (CDS) via the VizieR Service and the Aladin interface.
www.ipac.caltech.edu /2mass/overview/access.html   (373 words)

  
 Universal Data Access Drivers
Thus, the technology that impacts your ability to store, access, and disseminate data across the enterprise is of ever-increasing value.
Universal Data Access (UDA) middleware defines a category of software that provides transparent access to data sources (such as databases) from Desktop Productivity Tools, Application Development Environments, and Web and Internet Points of Presence.
UDA middleware ensures that your data assets remain yours to exploit in the manner that bests serves the needs of your organization.
uda.openlinksw.com   (410 words)

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