Requirements For Querying The Web Of Linked Data

Data objects can model relational data or advanced data types such as graphics, movies, and audio. Smalltalk, C++, Java, and others are objects used in object-oriented data. The object-relational is a combination of relational and object-oriented databases. Traditional and advanced data types can be used to construct database management systems. These systems can connect to a company’s website and update records as needed. Database Approach The main purpose of a database is data storage that can be stored and retrieved when needed. A popular common language called structured query language (SQL) is used to store and retrieve data in relational database. This language enables the systems to run a report or modify data or remove the data from the database. A database management system (DBMS) controls all aspects of a database, this is not limited to the creation, maintenance, and use of database. The DBMS ensures proper applications are able to access the database. An important purpose of a DBMS is to maintain the data definitions (data dictionary) for all the data elements in the database. It also enforces data integrity and security measures. Data Models Data models provide a contextual framework and graphical representation that aid in the definition of data elements. In a relational database, the data model lays the foundation for the database and identifies important entities,

Databases today are essential to every business. Whenever you visit a major Web site – Google, Yahoo!, Amazon.com, or thousands of smaller sites that provide information – there is a database behind the scenes serving up the information you request (Hector, Ullman, & Widom 2008). Database systems are becoming as common in the workplace as the essential one that it can easily be searched, categorized and recalled in different means that can be easily read and understood by the end user.

The data structure represents the logical relationships between data elements. In addition the data also determines the organizational structure, access methods, and alternative processing assosiativitas level for information.

PageRank is an algorithm developed by Sergey Brin and Lawrence Page which uses subset of network analysis to understand associations between nodes in a linked database. The algorithm uses multitude of parameters to assign PageRank to various pages and is the backbone to Google search functionality. Rank assigned to a webpage is calculated based on the ranks of the webpage citing it.

DeWitt, Naughton,Shanmugasundaram, Tufte, Zhang (1999) Relational Databases for Querying XML Documents: Limitations and Opportunities. Retrieved from: http://mit.ittelkom.ac.id/courses/biological-engineering/20-453j-biomedical-information-technology-fall-2008/readings/inlining_vldb.pdf

The semantic web is a vision created and promoted by Tim-Berners-Lee and the World Wide Web Consortium. In his article the Semantic Web in Scientific American (2001) Berners-Lee explains that The Semantic Web is not a separate Web but an extension of the current one, in which information is given well-defined meaning, better enabling computers and people to work in cooperation What Berners-Lee means by this is that in its current state, internet technology is not designed in a way in which computers and machines can interact with each other most efficiently. The primary reason for this disconnect is

Once the records are linked, a new dataset is generated. This dataset will undergo quality data evaluation before they are outputs for utilization.

A Linked List is a type of data structure that can be arranged in memory in a variety of ways. The list is a collection of nodes that contain data and a next link to the next node. It is easy to add and remove data from a linked list because the pointer can be easily modified to accommodate any changes. (CTU MUSE, 2010)

Query by Example (QBE) and Structured Query Language (SQL) are industry standard languages for querying data to obtain information from relational database systems.

languages also support the ability to embed and use the results of SQL queries. The

Relational database contains data records that do not have a preset of relationships, permitting the user to define his or her relationship when accessing the data. Since users have much control over the data being accessed, relational databases can perform a variety of tasks. Such as defining the database; querying the database; adding, editing, and deleting data from the database; modifying the structure of the database; securing data from public access; communicating within the network; and exporting and importing data (Murthy, 2008).

Queries make locating the data you want very simple. They could be used to locate a group of data named by the user.

Supporting SQL syntax also means that it is possible to integrate with existing tools like. Hive has an ODBC (Open Database Connectivity JDBC (Java Database Connectivity) driver that allows and facilitates easy queries. It also adds support for indexes which allows support for queries common in such environment. Hive is a framework for performing analytical queries. Currently Hive can be used to query data stored in HBase which is a key value store like those found in the gods of most RDBMS’s (Relational database management system) and the Hadoop database project uses Hive query RDBMS tier.

I used these relational tables in assignments like working with chinook database, where the queries are written for optimizing various results by joining tables.

The paper Semantic Web Revisited elaborates on the topic mentioned by the paper Semantic Web. The paper starts off with current research development in semantic web field and the challenges being faced. The paper describes the creation of basic language, framework, and protocols for the development of ontologies and logical connections. It elaborates on how other research fields like biology, medicine, environmental science etc. are helping in creating standardize ontologies. The paper also describes working and limitations of various technologies that are being used in the field of the semantic webs like XML, RDF, OWL, and Rules. The paper then focuses on the development aspect of ontologies and various challenges faced while creating a large community.