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Topic: Data abstraction


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In the News (Thu 31 Dec 09)

  
  Data abstraction   (Site not responding. Last check: 2007-10-27)
We are used to seeing data as either a collection of variables, each corresponding to a memory location, or as collections of individual data items, such as arrays and records.
Data abstraction with conventional imperative languages, like C, lets us define operations such as insertion and deletion for lists within the body of a procedure and then to program without regard to how they are achieved internally.
Object based abstraction says that the definition of a data structure and of the operations upon it should be as a single unit.
www.cee.hw.ac.uk /~rjp/Coursewww/CPPwww/databs.html   (625 words)

  
 Burnham's Beat: The Data Abstraction Layer: Software Architecture’s Great Frontier
Abstraction is one of the most basic principles of information technology and it underpins much of the advances in programming languages and technical architectures that have occurred in the past 20 years.
On the schema abstraction front, not many companies have made dramatic progress but companies such as Contivo are trying to create meta-data management systems which ultimately seek to enable the semantic integration of data schemas, while XML database companies such as Ipedo and Mark Logic continue to push forward the concept of infinitely extensible schemas.
Data Servers would standardized these approaches and they would also provide a centralized way to manage access control and performance issues that can't easily be managed from within a single application as that application simply doesn't have the context of what's going on elsewhere.
billburnham.blogs.com /burnhamsbeat/2004/04/the_data_abstra.html   (3382 words)

  
  Data abstraction   (Site not responding. Last check: 2007-10-27)
Bonddb object orientated database An object oriented wrapper that provides a fast data abstraction layer, written in C for C/C++, to allow easy access to class objects.
XE Resulting from the Exbed project, this general-purpose programming language supports data abstraction and rule-based programming and is based on but is not a formal extension of CLU.
Abstraction is no positive act: it is simply the negative of attention.
www.serebella.com /encyclopedia/article-Data_abstraction.html   (646 words)

  
 [No title]   (Site not responding. Last check: 2007-10-27)
The goal of abstraction is to isolate those aspects that are important for some purpose and suppress those aspects that are unimportant." -- [Rumbaugh et al, 1991] "The meaning [of abstraction] given by the Oxford English Dictionary (OED) closest to the meaning intended here is 'The act of separating in thought'.
Usually, abstraction is not defined in terms of information hiding, e.g., note the use of words such as "ignore" and "extracting." However, we should also note the use of the words "suppress" and "suppressing" in some of the above examples.
Using data abstraction, we would say that a list is a place where we can store information, but how the list is actually implemented (e.g., as an array or as a series of linked locations) is unimportant and should be hidden.
www.toa.com /pub/abstraction.txt   (2677 words)

  
 Data Abstraction
TMF works with each client to design and develop the best data abstraction and assessment tools for the specific data elements to be collected.
TMF ensures consistent data abstraction and inter-rater reliability through the use of thoughtfully designed tools and a well-defined process.
Our abstraction tools and clearly written instructions, coupled with thorough training, lead the abstractor to correctly identify specific data elements, key sources and rules related to the inclusion or exclusion of data.
consult.tmfhqi.net /DataAbstraction/tabid/339/Default.aspx   (436 words)

  
 Data Abstraction   (Site not responding. Last check: 2007-10-27)
Temporal data abstraction bridges the gap between low-level data delivered by, e.g., monitoring devices in an intensive care unit and high-level concepts used, e.g., in treatment plans.
This data is difficult to interpret by physicians in its unprocessed form and it is quite erroneous.
Previous approaches deriving these abstractions directly from the raw data did not produce satisfying results because the propagated the small and clinically meaningless oscillation of the data to the qualitative abstraction, i.e., the qualitative value changes frequently which did not yield an easily comprehensible picture of the state of the patient.
www.asgaard.tuwien.ac.at /data_abstract   (1350 words)

  
 Citations: Data Abstraction and Hierarchy - Liskov (ResearchIndex)   (Site not responding. Last check: 2007-10-27)
Citations: Data Abstraction and Hierarchy - Liskov (ResearchIndex)
Liskov, B., "Data Abstraction and Hierarchy," OOPSLA '87 Addendum to the Proceedings, pp.
Liskov, `Data abstraction and hierarchy', 00PSLA '87, Addendum to the Proceedings, October 1987, pp.
citeseer.ist.psu.edu /context/93923/0   (2515 words)

  
 Raymond Lewallen : Data Abstraction Defined   (Site not responding. Last check: 2007-10-27)
Data abstraction is the simplest of principles to understand.
Data abstraction and encapuslation are closely tied together, because a simple definition of data abstraction is the development of classes, objects, types in terms of their interfaces and functionality, instead of their implementation details.
So, in short, data abstraction is nothing more than the implementation of an object that contains the same essential properties and actions we can find in the original object we are representing.
www.codebetter.com /blogs/raymond.lewallen/archive/2005/02/17/51092.aspx   (513 words)

  
 data abstraction, consider designing a String class.
Simply stated, data abstraction refers to identifying key data types in an application, along with operations that are to be done on those types.
With data abstraction, there is a distinction made between the representation of a type, and public operations on and behavior of that type.
Data abstraction could be used to devise a Date type, independent of any other design techniques used in the application.
www.prayagasoft.com /two/two-92.htm   (1496 words)

  
 Outsourcing Data Abstraction services Resources/Guide
Data abstraction is the process of distilling data down to its essentials i.e.
We have extensive experience in data abstraction with large team of skilled professionals who excavate the World Wide Web and offer them to you in the format you call for.
Data abstraction is a base for the results of research work performed by you.
www.thuriam.com /Data-Harvesting/Data-Abstraction.html   (475 words)

  
 Elixir Data Abstraction
Another data abstraction is performed by the photcode system, which is described in some detail in elsewhere (Photometry Calibration).
One critical type of data abstraction is the abstraction of the FITS header keywords needed by any Elixir program.
It is a common problem in astronomical data analysis systems that FITS keywords used by one telescope & camera are rarely the same as used by another.
www.cfht.hawaii.edu /Instruments/Elixir/abstraction.html   (943 words)

  
 data abstraction - OneLook Dictionary Search   (Site not responding. Last check: 2007-10-27)
We found 3 dictionaries with English definitions that include the word data abstraction:
Tip: Click on the first link on a line below to go directly to a page where "data abstraction" is defined.
data abstraction : FOLDOP - Free On Line Dictionary Of Philosophy [home, info]
www.onelook.com /?w=data+abstraction   (94 words)

  
 "Data and Data Abstraction"
There are not so much set patterns of data, but relations of data, where certain kinds of data require certain patterns, and thes patterns interact.
These generators are defined by the fact that there is no simple list of patterns, that data may often reference itself, and that there is a kind of "cascade" effect where various patterns interact.
You may not have a huge stock of data, but you may have enough to test to see if it can be put into the propper orders and contexts.
www.seventhsanctum.com /archives/DataAbstract.html   (874 words)

  
 Data Abstraction and Problem Solving with C++ :... - SEO Spot   (Site not responding. Last check: 2007-10-27)
Data Abstraction and Problem Solving with C++ :...
Data Abstraction and Problem Solving with C++ : Walls and Mirrors (4th Edition)
Lot of algorithms and data structures are used in todays computer software of variuos types.
www.serverfocus.com /books/C-books-0321247256.html   (307 words)

  
 Print Version - Avaki 6 Delivers EII Plus to Simplify Data Integration and Facilitate Enterprise Data Abstraction Layer ...   (Site not responding. Last check: 2007-10-27)
Avaki's EII Plus capabilities provide the data integration flexibility to address a broad-range of projects and the scalability to extend a single data layer across a distributed enterprise.
With Avaki, customers leverage an enterprise data abstraction layer (also known as enterprise data services layer) that delivers fresh data to a variety of operational and decision support applications, while reducing the complexity and cost of developing and deploying data-intensive applications.
Avaki's Enterprise Data Integration Framework helps companies realize the full potential of their investments by providing the best of both worlds: the flexibility of multiple approaches and tools, with the control provided by a single data abstraction layer.
www.dmreview.com /editorial/dmreview/print_action.cfm?articleId=1015188   (498 words)

  
 Simple .NET data abstraction | GrantPalin.com
For related reading, I recently read an article discussing four types of data abstraction layers, ranging from simple to complex, and points out their similarities and differences.
It could however be extended to become a Type 3; it takes a complete query string to run a query, but it could be further abstracted to provide more insulation from details of SQL syntax, and differences in that syntax between different systems.
One convenient way to spread data access across pages is using polymorphism and using objects in PHP to pass an object and it’s methods between classes/pages without ever creating duplicate connections to the database over pages.
www.grantpalin.com /2006/08/23/simple-net-data-abstraction   (1413 words)

  
 Citations: Data Abstraction and Object-oriented Programming in C - Gorlen, Orlow, Plexico (ResearchIndex)
In [38] the data interfaces were defined as classes for the representation of segmentation results.
Thus, in order to apply an object oriented approach to software reuse, this project focuses on data abstraction, where it is assumed that procedural abstractions are automatically addressed when discussing the operations that are applicable to the data abstractions.
Thus, in order to apply an object oriented approach to software reuse, this project focuses on data abstraction, where it is assumed that procedural abstractions are implicitly addressed when discussing the operations that are applicable to the data abstractions.
citeseer.ist.psu.edu /context/41124/0   (2331 words)

  
 data abstraction: abstraction solving 3rd problem c++:   (Site not responding. Last check: 2007-10-27)
Of the three data structure books I have read, this was the easiest to read.
The data structure code in the other two books were not as good, because they left too many of the data structures as exercises for the reader.
This is the best book i ever found on data structures.It starts from the real english language and moves on to the pseudocode and c++ code efficiently.The algorithms are real good.Many real world examples are given.The book is certainly worth its price.
www.programming123.com /detail/data_abstraction/data_abstraction_0201741199.html   (189 words)

  
 Data Abstraction and Problem Solving with Java,... - Backup Whiz   (Site not responding. Last check: 2007-10-27)
backup whiz » books » java »; data abstraction and problem solving with java, walls and mirr...
I have a feeling the only reason why the computer science department at my school chose this book is because someone knew one of the publishing rep's and that's why it's been used for so long.
His writing is way more concise and I found it solidified the material in about half the time as when I was trying to read this book.
www.backupwhiz.com /books/Java-books-0321197178.html   (607 words)

  
 Data Abstraction and Problem Solving with C++: Walls and Mirrors (3rd Edition)   (Site not responding. Last check: 2007-10-27)
Data Abstraction and Problem Solving with C++: Walls and Mirrors (3rd Edition)
lt;br /gt;Lot of algorithms and data structures are used in todays computer software of variuos types.
Not all data structures or algorithms on them are adequate for solving a particular problem, so you must have some skills to say which one is "better" than another in your particular situation.
www.programming-reviews.com /Data_Abstraction_and_Problem_Solving_with_C_Walls_and_Mirrors_3rd_Edition_0201741199.html   (414 words)

  
 CCORP- Data Abstraction Tools
Hospitals are required to choose one of the three methods to collect the required data elements:
CCORP data collection tool - A copy of the CCORP tool is available to hospitals upon request.
In-house tool that meets the data requirements in Section 97174 and the format specifications in Section 97182.
www.oshpd.cahwnet.gov /HQAD/Outcomes/CCORP/Tools/Abstraction.htm   (78 words)

  
 GDV 2005 - Games In Design and Verification - Abstracts   (Site not responding. Last check: 2007-10-27)
We present a semantic framework for data abstraction and refinement for verifying safety properties of open programs.
The presentation is focused on an Algol-like programming language that incorporates data abstraction in its syntax.
The fully abstract game semantics of the language is used for model-checking safety properties, and an interaction-sequence-based semantics is used for interpreting potentially spurious counterexamples and computing refined abstractions for the next iteration.
www.cs.ucla.edu /~rupak/gdv2005_files/abstract-lazic.html   (94 words)

  
 GDAL: GDAL - Geospatial Data Abstraction Library
is a translator library for raster geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation.
As a library, it presents a single abstract data model to the calling application for all supported formats.
It also comes with a variety of useful commandline utilities for data translation and processing.
www.gdal.org   (277 words)

  
 abstract data type from FOLDOC   (Site not responding. Last check: 2007-10-27)
This allows the implementation of the type to be changed without requiring any changes outside the module in which it is defined.
Objects and ADTs are both forms of data abstraction, but objects are not ADTs.
A classic example of an ADT is a stack data type for which functions might be provided to create an empty stack, to push values onto a stack and to pop values from a stack.
www.foldoc.org /foldoc/foldoc.cgi?abstract+data+type   (136 words)

  
 CITIDEL: Viewing 'Data abstraction and hiding in Fortran'   (Site not responding. Last check: 2007-10-27)
Moreover, data object definitions themselves may be made externally, and used without local redefinition.
Thus the implementation details of any data object may also be ignored by the user.
Fortran 8x therefore provides many of the features of data abstraction as well as procedural abstraction.

The proposed Fortran 8x mechanisms for data object definition and external data libraries will be described, with examples of their use as data abstraction facilities.

www.citidel.org /?op=getobj&identifier=oai:ACMDL:articles.809828   (221 words)

  
 Data Abstraction
Data abstraction is the process of distilling data down to its essentials.
In an object schema, the abstract data model is implemented as a graph.
For another example of data abstraction, see the complex data
www.service-architecture.com /database/articles/data_abstraction.html   (605 words)

  
 ~ryanlowe/blog: Data Abstraction Layer Architecture
I took my hands off Eclipse for a bit and thought about AudioMan's architecture, specifically the Data Abstraction Layer (DAL) and wrote up a whole section on it.
The key to the new Data Abstraction Layer is the notion of models and mutators.
A model is a bunch of data that the user interface displays in views and mutators are functions that change the models.
www.ryanlowe.ca /blog/archives/000427_data_abstraction_layer_architecture.php   (181 words)

  
 Data abstraction - Dictionary Definition and Meaning of Data abstraction
Data abstraction - Dictionary Definition and Meaning of Data abstraction
Any representation of data in which the implementation details are hidden (abstracted).
Abstract data types and objects are the two primary forms of data abstraction.
www.wordiq.com /define/data_abstraction.html   (99 words)

  
 Data Abstraction and Problem Solving with Java, Walls and Mirrors, Updated Edition , Find lowest book prices, ...   (Site not responding. Last check: 2007-10-27)
Data Abstraction and Problem Solving with Java, Walls and Mirrors, Updated Edition ISBN 0321197178 Author Frank M. Carrano,...
Data Abstraction and Problem Solving in C++, and is now updated to the Java programming language.
This book is based on the classic "Walls and Mirrors" approach used in the best-selling Data Abstraction and Problem Solving with C++, and is now updated to the Java programming language.
www.aaabooksearch.com /search/Data_Abstraction_and_Problem_Solving_with_Java_-_Walls_and_Mirrors_/0321197178   (408 words)

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