Transcript COMM 1213 H1 COMP 4923 X1

COMM 1213 H1
COMP 4923 X1
HTML Page Structure
and Navigation
(Readings: Ch. 5 Lazar)
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Outline
• Information Architecture
• Site Navigation
EG
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Defintions
• Information Architecture
– How large information spaces are organized for
optimal user interaction
– Structure of website
• Site navigation
– Provides a map through website
– Good site navigation = easy to find content
– “If the user can’t find it, the information is not there.”
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Analysis versus Design
• Dealt with during design, just after
requirements analysis
• Requirements analysis
 What
• Design  How
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Important issues during analysis
and design:
• Purpose and title of webpage
• Content to be developed
– Consider how it will be developed
• How often data will be updated
– Who will perform the update
• Relationship between content
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Determine Content Objects
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A well-defined piece of content
Smallest granularity of content for the site
Static or dynamic (database driven)
More than one object can exist per page
Example:
– catalog entries is an object
– a specific item is an instance
• Prioritize objects as to their importance –
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mandatory, desirable, optional
Rarely is all content provided in first release
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Organize Content Objects
• Allocate objects to webpages – use a table
• Cognitive models – how users organize
information in their minds
• Use paper prototypes (cards) and look for
– Groupings
– Flow
– Hierarchy
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Organize Content Objects
• Theoretical Foundations – Menu design
– Hierarchical structure is preferred
– Series of menus arranged in a tree structure
• depth (number of menus levels)
• Breadth (number of items per menu)
– Short depth, wide breadth preferred .. Why?
– Breadth should decreases as depth increases
.. Why?
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Organize Content Objects
• Theoretical Foundations – Menu design
– No more than 4 or 5 clicks to desired content
– Else …. cognitive overload
– Humans can deal with 5-9 items / chunks
• Consider a food menu structure:
– Choice A – list of 500 food items
– Choice B – 10 groups of items by country of origin
– Choice C – 5 groups based on order of eating
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Web Navigation
• Three types of information for user:
– Where they have been
• History, back button, visited link colors
– Where they are
• Title of page = “you are here” sign
• Context = site map, bread crumbs, tabs
– Where they can go
• Descriptive, conveys structure, consistent
throughout site
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Web Navigation
• Four most common types:
– Topical navigation
• Organized by topic - Our course website
– Audience-splitting navigation
• Directs visitors based on their roles with respect to
site - Acadia website
– Metaphor navigation
• Relate information to objects
in user’s life
– Organizational navigation
• Based on organizational chart
• OK for internal, but not external users
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Location of Navigation
• Developer can not be certain of available
screen space
• Navigation must be easily visible
– Top
– Left
– Combination of top and left
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Resources
• Getting started with HTML from the W3C
• W3C's Recommendation for HTML 4.0 is the
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authoritative specification for HTML
W3 Schools HTML Tutorial
HTML Goodies HTML Primer
An HTML Code Tutorial
Writing HTML a tutorial for creating web pages (a
little old but a different perspective)
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THE END
[email protected]
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Architectural of the Internet
Acadia
Client 1
Application
Client 2
Server X
TCP/IP
Internet
Application
Intrane
t
Server Y
Server C
Server B
Server C
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TCP/IP Protocol Architecture
Transmission Control Protocol
Internet Protocol
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TCP/IP Protocol Architecture
• Internet Protocol (IP) – like a postcard
that contains:
– Destination address (131.162.201.7)
– Return address
– Block of data (content)
• Transmission Control Protocol (TCP)
– Ensures the post card gets through
– Ensures the order of deliver
– Handles errors and control flow
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Client-Server Applications that
use the Internet
Telnet Window
FTP Client
eMail Client
TCP
IP
Network
Physical
Telnet Protocol
FTP
SMTP/POP
Internet
Telnet Server
FTP Server
eMail Server
TCP
IP
Network
Physical
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Major Architectural Components
of the Web
Client 1
Browser
Client 2
HTTP
TCP/IP
Internet
Browser
Server A
HTTP
Server
App.
Server
Database
Server
URL index.html
Server B
Server C
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Images
• Various digital image formats can be
embedded with in HTML: .gif, .jpg
• Example <BODY>
<H1>My new baby girl.</H1>
<IMG SRC=“NicoleSilver.jpg”>
</BODY>
• See www.bellsnwhistles.com as source of
images and other objects.
• Let’s down load one and try it …
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Hyper Links
<HTML><HEAD></HEAD>
<BODY>
<H1>My Oldest Daughter.</H1>
<IMG SRC=“Natalie.jpg”>
Natalie goes to
<A HREF=“http://www.ems.ednet.ns.ca”>Evangeline Middle
School</A>
Which is in New Minas.
Click <A HREF=“mailto:[email protected]”>Here</A> to send
her email.
</BODY>
</HTML>
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