1.
World Wide Web
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The World Wide Web is an information space where documents and other web resources are identified by Uniform Resource Locators, interlinked by hypertext links, and can be accessed via the Internet. English scientist Tim Berners-Lee invented the World Wide Web in 1989 and he wrote the first web browser computer program in 1990 while employed at CERN in Switzerland. The Web browser was released outside of CERN in 1991, first to research institutions starting in January 1991. The World Wide Web has been central to the development of the Information Age and is the primary tool billions of people use to interact on the Internet, Web pages are primarily text documents formatted and annotated with Hypertext Markup Language. In addition to formatted text, web pages may contain images, video, audio, embedded hyperlinks permit users to navigate between web pages. Multiple web pages with a theme, a common domain name. Website content can largely be provided by the publisher, or interactive where users contribute content or the content depends upon the user or their actions, websites may be mostly informative, primarily for entertainment, or largely for commercial, governmental, or non-governmental organisational purposes. In the 2006 Great British Design Quest organised by the BBC and the Design Museum, Tim Berners-Lees vision of a global hyperlinked information system became a possibility by the second half of the 1980s. By 1985, the global Internet began to proliferate in Europe, in 1988 the first direct IP connection between Europe and North America was made and Berners-Lee began to openly discuss the possibility of a web-like system at CERN. Such a system, he explained, could be referred to using one of the meanings of the word hypertext. At this point HTML and HTTP had already been in development for two months and the first Web server was about a month from completing its first successful test. While the read-only goal was met, accessible authorship of web content took longer to mature, with the concept, WebDAV, blogs, Web 2.0. The proposal was modelled after the SGML reader Dynatext by Electronic Book Technology, a NeXT Computer was used by Berners-Lee as the worlds first web server and also to write the first web browser, WorldWideWeb, in 1990. By Christmas 1990, Berners-Lee had built all the necessary for a working Web, the first web browser. The first web site, which described the project itself, was published on 20 December 1990, jones stored it on a magneto-optical drive and on his NeXT computer. On 6 August 1991, Berners-Lee published a summary of the World Wide Web project on the newsgroup alt. hypertext. This date is confused with the public availability of the first web servers. The first server outside Europe was installed at the Stanford Linear Accelerator Center in Palo Alto, California, accounts differ substantially as to the date of this event
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Open-source model
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Open-source software may be developed in a collaborative public manner. According to scientists who studied it, open-source software is a prominent example of open collaboration, a 2008 report by the Standish Group states that adoption of open-source software models has resulted in savings of about $60 billion per year to consumers. In the early days of computing, programmers and developers shared software in order to learn from each other, eventually the open source notion moved to the way side of commercialization of software in the years 1970-1980. In 1997, Eric Raymond published The Cathedral and the Bazaar and this source code subsequently became the basis behind SeaMonkey, Mozilla Firefox, Thunderbird and KompoZer. Netscapes act prompted Raymond and others to look into how to bring the Free Software Foundations free software ideas, the new term they chose was open source, which was soon adopted by Bruce Perens, publisher Tim OReilly, Linus Torvalds, and others. The Open Source Initiative was founded in February 1998 to encourage use of the new term, a Microsoft executive publicly stated in 2001 that open source is an intellectual property destroyer. I cant imagine something that could be worse than this for the software business, IBM, Oracle, Google and State Farm are just a few of the companies with a serious public stake in todays competitive open-source market. There has been a significant shift in the corporate philosophy concerning the development of FOSS, the free software movement was launched in 1983. In 1998, a group of individuals advocated that the free software should be replaced by open-source software as an expression which is less ambiguous. Software developers may want to publish their software with an open-source license, the Open Source Definition, notably, presents an open-source philosophy, and further defines the terms of usage, modification and redistribution of open-source software. Software licenses grant rights to users which would otherwise be reserved by law to the copyright holder. Several open-source software licenses have qualified within the boundaries of the Open Source Definition, the open source label came out of a strategy session held on April 7,1998 in Palo Alto in reaction to Netscapes January 1998 announcement of a source code release for Navigator. They used the opportunity before the release of Navigators source code to clarify a potential confusion caused by the ambiguity of the free in English. Many people claimed that the birth of the Internet, since 1969, started the open source movement, the Free Software Foundation, started in 1985, intended the word free to mean freedom to distribute and not freedom from cost. Since a great deal of free software already was free of charge, such software became associated with zero cost. The Open Source Initiative was formed in February 1998 by Eric Raymond and they sought to bring a higher profile to the practical benefits of freely available source code, and they wanted to bring major software businesses and other high-tech industries into open source. Perens attempted to open source as a service mark for the OSI. The Open Source Initiatives definition is recognized by governments internationally as the standard or de facto definition, OSI uses The Open Source Definition to determine whether it considers a software license open source
3.
Hypertext Transfer Protocol
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The Hypertext Transfer Protocol is an application protocol for distributed, collaborative, and hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, Hypertext is structured text that uses logical links between nodes containing text. HTTP is the protocol to exchange or transfer hypertext, development of HTTP was initiated by Tim Berners-Lee at CERN in 1989. Standards development of HTTP was coordinated by the Internet Engineering Task Force and the World Wide Web Consortium, culminating in the publication of a series of Requests for Comments. The first definition of HTTP/1.1, the version of HTTP in common use, occurred in RFC2068 in 1997, although this was obsoleted by RFC2616 in 1999 and then again by RFC7230 and family in 2014. A later version, the successor HTTP/2, was standardized in 2015, HTTP functions as a request–response protocol in the client–server computing model. A web browser, for example, may be the client, the client submits an HTTP request message to the server. The server, which provides resources such as HTML files and other content, or performs other functions on behalf of the client, the response contains completion status information about the request and may also contain requested content in its message body. A web browser is an example of a user agent, other types of user agent include the indexing software used by search providers, voice browsers, mobile apps, and other software that accesses, consumes, or displays web content. HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers, high-traffic websites often benefit from web cache servers that deliver content on behalf of upstream servers to improve response time. Web browsers cache previously accessed web resources and reuse them when possible to network traffic. HTTP proxy servers at private network boundaries can facilitate communication for clients without a globally routable address, HTTP is an application layer protocol designed within the framework of the Internet protocol suite. Its definition presumes an underlying and reliable transport layer protocol, however HTTP can be adapted to use unreliable protocols such as the User Datagram Protocol, for example in HTTPU and Simple Service Discovery Protocol. HTTP resources are identified and located on the network by Uniform Resource Locators, using the Uniform Resource Identifiers schemes http, uRIs and hyperlinks in HTML documents form inter-linked hypertext documents. HTTP/1.1 is a revision of the original HTTP, in HTTP/1.0 a separate connection to the same server is made for every resource request. HTTP/1.1 can reuse a connection multiple times to download images, scripts, stylesheets, HTTP/1.1 communications therefore experience less latency as the establishment of TCP connections presents considerable overhead. Tim Berners-Lee and his team at CERN are credited with inventing the original HTTP along with HTML and the technology for a web server. Berners-Lee first proposed the WorldWideWeb project in 1989—now known as the World Wide Web, the first version of the protocol had only one method, namely GET, which would request a page from a server
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JSON
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In computing, JSON is an open-standard format that uses human-readable text to transmit data objects consisting of attribute–value pairs. It is the most common format used for asynchronous browser/server communication, largely replacing XML. JSON is a language-independent data format and it was derived from JavaScript, but as of 2017 many programming languages include code to generate and parse JSON-format data. The official Internet media type for JSON is application/json, Douglas Crockford originally specified the JSON format in the early 2000s, two competing standards, RFC7159 and ECMA-404, defined it in 2013. The ECMA standard describes only the allowed syntax, whereas the RFC covers some security and interoperability considerations, RFC7493 defines a restricted profile of JSON, known as I-JSON, which seeks to overcome some of the interoperability problems with JSON. Every I-JSON document is a valid JSON document but not every valid JSON document is a valid I-JSON document. JSON grew out of a need for stateful, real-time server-to-browser communication protocol without using browser plugins such as Flash or Java applets, Douglas Crockford first specified and popularized the JSON format. The acronym originated at State Software, a company co-founded by Crockford, F. Randall Randy Farmer, Greg Macdonald, Chip Morningstar, Robert F. Napiltonia and Dominik Zynis in March 2001. State Software was funded by Tesla Ventures with $1.8 Million in October 2011, the co-founders had a round-table discussion and voted whether to call the data format JSML or JSON, as well as under what license type to make it available. Morningstar developed the idea for the State Application Framework at State Software, on the other hand, this clause lead to license compatibility problems of the JSON license with other open-source licenses. Crockford then found that JavaScript could be used as a messaging format for such a system. The system was sold to Sun Microsystems, Amazon. com, the JSON. org Web site was launched in 2002. In December 2005, Yahoo. began offering some of its Web services in JSON, Google started offering JSON feeds for its GData web protocol in December 2006. JSON was originally intended to be a subset of the JavaScript scripting language and is used with Javascript. Code for parsing and generating JSON data is available in many programming languages. JSONs Web site lists JSON libraries by language, JSON itself became an ECMA international standard in 2013 as the ECMA-404 standard. In the same year RFC7158 used ECMA-404 as reference, in 2014 RFC7159 became the main reference for JSONs internet uses, and obsoletes RFC4627 and RFC7158. JSONs basic data types are, Number, a decimal number that may contain a fractional part and may use exponential E notation
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Service-oriented architecture
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A service-oriented architecture is a style of software design where services are provided to the other components by application components, through a communication protocol over a network. The basic principles of service oriented architecture are independent of vendors, products, a service is a discrete unit of functionality that can be accessed remotely and acted upon and updated independently, such as retrieving a credit card statement online. A service has four properties according to one of many definitions of SOA and it is a black box for its consumers. It may consist of other underlying services, different services can be used in conjunction to provide the functionality of a large software application. So far, the definition could be a definition of modular programming in the 1970s and it is enabled by technologies and standards that make it easier for components to communicate and cooperate over a network, especially an IP network. In SOA, services use protocols which describe how they pass and this metadata describes both the functional characteristics of the service and quality-of-service characteristics. Service-oriented architecture aims to allow users to combine large chunks of functionality to form applications which are purely from existing services. A service presents an interface to the requester that abstracts away the underlying complexity acting as a black box. Further users can access these independent services without any knowledge of their internal implementation. The related buzzword service-orientation promotes loose coupling between services, SOA separates functions into distinct units, or services, which developers make accessible over a network in order to allow users to combine and reuse them in the production of applications. These services and their corresponding consumers communicate with each other by passing data in a well-defined, shared format, a manifesto was published for service-oriented architecture in October,2009. This came up with six core values which are listed as follows, strategic goals are given more importance than project-specific benefits. Intrinsic inter-operability is given more importance than custom integration, shared services are given more importance than specific-purpose implementations. Flexibility is given more importance than optimization, evolutionary refinement is given more importance than pursuit of initial perfection. There are no industry standards relating to the composition of a service-oriented architecture. Service reference autonomy The relationship between services is minimized to the level that they are aware of their existence. Service location transparency Services can be called from anywhere within the network that it is located no matter where it is present, Service longevity Services should be designed to be long lived. Where possible services should avoid forcing consumers to change if they do not require new features, Service abstraction The services act as black boxes, that is their inner logic is hidden from the consumers
6.
Eclipse (software)
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Eclipse is an integrated development environment used in computer programming, and is the most widely used Java IDE. It contains a base workspace and an extensible plug-in system for customizing the environment and it can also be used to develop documents with LaTeX and packages for the software Mathematica. Development environments include the Eclipse Java development tools for Java and Scala, Eclipse CDT for C/C++, the initial codebase originated from IBM VisualAge. The Eclipse software development kit, which includes the Java development tools, is meant for Java developers and it was one of the first IDEs to run under GNU Classpath and it runs without problems under IcedTea. Eclipse was inspired by the Smalltalk-based VisualAge family of integrated development environment products, although fairly successful, a major drawback of the VisualAge products was that developed code was not in a component-based software engineering model. Instead, all code for a project was held in a compressed lump, individual classes could not be easily accessed, certainly not outside the tool. A team primarily at the IBM Cary NC lab developed the new product as a Java-based replacement, in November 2001, a consortium was formed with a board of stewards to further the development of Eclipse as open-source software. It is estimated that IBM had already invested nearly $40 million by that time, the original members were Borland, IBM, Merant, QNX Software Systems, Rational Software, Red Hat, SuSE, TogetherSoft, and WebGain. The number of stewards increased to over 80 by the end of 2003, in January 2004, the Eclipse Foundation was created. Eclipse 3.0 selected the OSGi Service Platform specifications as the runtime architecture, the Association for Computing Machinery recognized Eclipse with the 2011 ACM Software Systems Award on 26 April 2012. The Eclipse Public License is the license under which Eclipse projects are released. Some projects require dual licensing, for which the Eclipse Distribution License is available, Eclipse was originally released under the Common Public License, but was later re-licensed under the Eclipse Public License. The Free Software Foundation has said that both licenses are free software licenses, but are incompatible with the GNU General Public License, different versions of Eclipse have been given different science-related names. The versions named after Callisto, Europa, and Ganymede, which are moons of Jupiter, were followed by a named after Galileo the discoverer of those moons. These were followed by two sun-themed names, Helios of Greek mythology, and Indigo, one of the seven colors of a rainbow, the version after that, Juno, has a triple meaning, a Roman mythological figure, an asteroid, and a spacecraft to Jupiter. Kepler, Luna, and Mars continued the theme, and then a new theme of chemical elements began with Neon. Since 2006 the Foundation has coordinated an annual Simultaneous Release, each release includes the Eclipse Platform and several other Eclipse projects. As of 2008, each Simultaneous Release has occurred on the 4th Wednesday of June, Eclipse uses plug-ins to provide all the functionality within and on top of the runtime system
7.
Middleware
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Middleware is computer software that provides services to software applications beyond those available from the operating system. It can be described as software glue, middleware makes it easier for software developers to implement communication and input/output, so they can focus on the specific purpose of their application. The term is most commonly used for software that enables communication, an IETF workshop in 2000 defined middleware as those services found above the transport layer set of services but below the application environment. In this more specific sense middleware can be described as the dash in client-server, middleware includes web servers, application servers, content management systems, and similar tools that support application development and delivery. ObjectWeb defines middleware as, The software layer that lies between the system and applications on each side of a distributed computing system in a network. Services that can be regarded as middleware include enterprise application integration, data integration, message oriented middleware, object request brokers, database access services are often characterised as middleware. Some of them are language specific implementations and support heterogeneous features, examples of database-oriented middleware include ODBC, JDBC and transaction processing monitors. Distributed computing system middleware can loosely be divided into two categories—those that provide services and those that perform in machine-time. This latter middleware is somewhat standardized through the Service Availability Forum and is used in complex, embedded systems within telecom, defense. The term middleware is used in contexts as well. Middleware is sometimes used in a sense to a software driver. The mer software distribution is a middleware, it lacks the Linux kernel, mer is targeted at hardware vendors mobile-oriented operating systems. The Android operating system uses the Linux kernel at its core, in addition, Android provides a middleware layer including libraries that provide services such as data storage, screen display, multimedia, and web browsing. Because the middleware libraries are compiled to machine language, services execute quickly, middleware libraries also implement device-specific functions, so applications and the application framework need not concern themselves with variations between various Android devices. Androids middleware layer also contains the Dalvik virtual machine and its core Java application libraries, game engine software such as Gamebryo and Renderware are sometimes described as middleware, because they provide many services to simplify game development. In simulation technology, middleware is used in the context of the high level architecture that applies to many distributed simulations. It is a layer of software that lies between the code and the run-time infrastructure. Wireless networking developers can use middleware to meet the associated with a wireless sensor network
8.
International Standard Book Number
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The International Standard Book Number is a unique numeric commercial book identifier. An ISBN is assigned to each edition and variation of a book, for example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, the method of assigning an ISBN is nation-based and varies from country to country, often depending on how large the publishing industry is within a country. The initial ISBN configuration of recognition was generated in 1967 based upon the 9-digit Standard Book Numbering created in 1966, the 10-digit ISBN format was developed by the International Organization for Standardization and was published in 1970 as international standard ISO2108. Occasionally, a book may appear without a printed ISBN if it is printed privately or the author does not follow the usual ISBN procedure, however, this can be rectified later. Another identifier, the International Standard Serial Number, identifies periodical publications such as magazines, the ISBN configuration of recognition was generated in 1967 in the United Kingdom by David Whitaker and in 1968 in the US by Emery Koltay. The 10-digit ISBN format was developed by the International Organization for Standardization and was published in 1970 as international standard ISO2108, the United Kingdom continued to use the 9-digit SBN code until 1974. The ISO on-line facility only refers back to 1978, an SBN may be converted to an ISBN by prefixing the digit 0. For example, the edition of Mr. J. G. Reeder Returns, published by Hodder in 1965, has SBN340013818 -340 indicating the publisher,01381 their serial number. This can be converted to ISBN 0-340-01381-8, the check digit does not need to be re-calculated, since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with Bookland European Article Number EAN-13s. An ISBN is assigned to each edition and variation of a book, for example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN. The ISBN is 13 digits long if assigned on or after 1 January 2007, a 13-digit ISBN can be separated into its parts, and when this is done it is customary to separate the parts with hyphens or spaces. Separating the parts of a 10-digit ISBN is also done with either hyphens or spaces, figuring out how to correctly separate a given ISBN number is complicated, because most of the parts do not use a fixed number of digits. ISBN issuance is country-specific, in that ISBNs are issued by the ISBN registration agency that is responsible for country or territory regardless of the publication language. Some ISBN registration agencies are based in national libraries or within ministries of culture, in other cases, the ISBN registration service is provided by organisations such as bibliographic data providers that are not government funded. In Canada, ISBNs are issued at no cost with the purpose of encouraging Canadian culture. In the United Kingdom, United States, and some countries, where the service is provided by non-government-funded organisations. Australia, ISBNs are issued by the library services agency Thorpe-Bowker
9.
XML
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In computing, Extensible Markup Language is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. The W3Cs XML1.0 Specification and several other related specifications—all of them free open standards—define XML, the design goals of XML emphasize simplicity, generality, and usability across the Internet. It is a data format with strong support via Unicode for different human languages. Although the design of XML focuses on documents, the language is used for the representation of arbitrary data structures such as those used in web services. Several schema systems exist to aid in the definition of XML-based languages, hundreds of document formats using XML syntax have been developed, including RSS, Atom, SOAP, SVG, and XHTML. XML-based formats have become the default for many office-productivity tools, including Microsoft Office, OpenOffice. org and LibreOffice, XML has also provided the base language for communication protocols such as XMPP. Applications for the Microsoft. NET Framework use XML files for configuration, apple has an implementation of a registry based on XML. XML has come into use for the interchange of data over the Internet. IETF RFC7303 gives rules for the construction of Internet Media Types for use when sending XML and it also defines the media types application/xml and text/xml, which say only that the data is in XML, and nothing about its semantics. The use of text/xml has been criticized as a source of encoding problems. RFC7303 also recommends that XML-based languages be given media types ending in +xml, further guidelines for the use of XML in a networked context appear in RFC3470, also known as IETF BCP70, a document covering many aspects of designing and deploying an XML-based language. The material in this section is based on the XML Specification and this is not an exhaustive list of all the constructs that appear in XML, it provides an introduction to the key constructs most often encountered in day-to-day use. Character An XML document is a string of characters, almost every legal Unicode character may appear in an XML document. Processor and application The processor analyzes the markup and passes structured information to an application, the specification places requirements on what an XML processor must do and not do, but the application is outside its scope. The processor is often referred to colloquially as an XML parser, Markup and content The characters making up an XML document are divided into markup and content, which may be distinguished by the application of simple syntactic rules. Generally, strings that constitute markup either begin with the character < and end with a >, or they begin with the character &, strings of characters that are not markup are content. However, in a CDATA section, the delimiters <. > are classified as markup, in addition, whitespace before and after the outermost element is classified as markup. Tag A tag is a construct that begins with <
