The user [device] displays and allows the user to interact with cards of information. Logically, a user navigates through a series of HDML cards, reviews the contents of each, enters requested information, makes choices, and moves on to another or returns to a previously visited card. Cards come in one of four forms: Nodisplay, Display, Choice, or Entry. Display, choice, and entry cards contain text and/or references to images that are displayed to the user. Choice cards allow the user to pick from a list of mobile number tracker available options, and entry cards allow the user to enter text. While it is expected that cards contain short pieces of information, they might contain more information than can be displayed in one screen full. The user [device] will provide a mechanism for the user to view the entire contents of the card, An example of this would be a user-interface that allows scrolling through the infommtion.’ In the HDML standard a collection of several cards is called a ‘deck’.
This approach permits more efficient use of bandwidth because it allows for down-loading small decks of information into a mobile phone rather than needing an over-air transmission each time a new bit of information is requested. The authors explain that the deck is roughly the equivalent of a web page: HDML cards are grouped together into decks. An HDML deck is similar to an HTML page in that it is identified by a URL and is the unit of content requested from a server and cached by the user agent. Individual cards within a deck are identified by name and can be addressed by URL fragment. Micromax Canvas 6 pro
WAP stands for Wireless Access Protocol, a bearer-independent service devel-oped by the Wireless Application Protocol Forum which later became the Open Mobile Alliance. WAP is in fact not a single standard but a set of protocols designed to work together to resolve some of the constraints of transmitting data over cellular networks. For instance, WAP pages are written in ‘Wireless Markup Language (WML), a derivative of HDML, but also require a host of other pro-tocols to coordinate the signals that pass between the server, an operator’s gateway and internal network, the base station and air-link segment and ultimately to the handset.WAP is properly described as a bearer-independent protocol, which means that it can operate over any air-link standard, although most of the early WAP services were developed for and ran over GSM networks. When it was first introduced mobile data services were mostly circuit-based