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Lecture

lecture_12_-_b.docx

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Department
Information Technology
Course Code
ITEC 1000
Professor
all

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Introduction to Information Technology ITEC 1000 – Winter 2010 – Peter Khaiter Lecture 12 – Basic HTML – Mar 29 World Wide Web - WWW is a service on the Internet - WWW links information, so that user can easily go from one piece of information to another related piece - WWW is based on HTML Hypertext Mark-up Language (HTML) - HTML is a standard programming language used to: o Create and organized documents on the World Wide Web o Format text o Add graphics, sound, video; and o Save it all in a textonly or ASCII format, so that any computer can read a Web page Web Browser - Computer program to view a Web page - Functions: o Search and access a Web-server; o Load, format, and display HTML-documents; o Hyperlink detection and moving from one document to another; o Standard tools support HTML Features - Hypertext, that allows to create a link in a Web page that leads to any other pages on the Web. Hence information on the Web can be accessed from many different locations - Universality means that any computer can read a Web page regardless of platforms or operating systems HTML Files - Must be saved as text files with extension html or htm. The extension tells the browser that file is to be interpreted according to HTML standards - Have relatively small sizes - Can be created with any text editor, including Notepad and WordPad (for Windows) or TeachText or SimpleText (on Mac) HTML Building Blocks - HTML tags are commands written between angle brackets < >, that indicate how browser should display the text. - Tags may have opening and closing version - Text is placed in a container (or HTML element), which starts with opening tag and ends with closing tag, e.g.: Bold text HTML Rules - Case insensitive - Spacing: Browsers ignore extra spaces - Block-level tags include automatic line breaks o Examples: P, H1, UL, TABLE Tag Attributes - Attributes offer a variety of options - Attributes are entered between command word and final symbol “>” - A single tag may have a few attributes - Attributes are placed one after the other in any order Attribute Values - Attributes can accept the values of particular types - Values of attributes should be enclosed in straight quotation marks - “” may be omitted if the value contains only letters (A-Z, a-z), digits (0-9), hyphen (-), or a period (.) Nesting Tags - Hierarchy – tags that affect entire paragraph may contain tags affecting individual words or letters - Order – the current closing tag should correspond to the last unclosed opening tag Starting a Web Page - Identify the content of the document as an HTML code: Head and Body - HEAD-section defines the title of the page (used by searching engines) - BODY-section defines
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