Www challenges supporting users in search and navigation
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WWW Challenges : Supporting Users in Search and Navigation. SOFSEM 2004. Natasa Milic-Frayling Microsoft Research, Cambridge UK. January 28, 2004. Introduction. Intersection Browser Interface – Internet, Intranet, services, local drives. Devices and applications: TabletPC, PDA, eBook

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Www challenges supporting users in search and navigation

WWW Challenges:Supporting Users in Search and Navigation

SOFSEM 2004

Natasa Milic-Frayling

Microsoft Research, Cambridge UK

January 28, 2004


Introduction

Introduction

  • Intersection

    • Browser Interface – Internet, Intranet, services, local drives.

    • Devices and applications: TabletPC, PDA, eBook

    • Services: MSN Portal and Search - on-line searching, reading, and browsing

  • Research:

    • Web usage and interfaces

    • Optimization of service architectures

    • Text Classification – support for document classification, routing, filtering

  • Presentation Focus

    • WWW challenges in designing effective services and applications.


  • Introduction1

    Introduction

    • Intersection

      • Browser Interface – Internet, Intranet, services, local drives.

      • Devices and applications: TabletPC, PDA, eBook

      • Services: MSN Portal and Search - on-line searching, reading, and browsing

    • Research:

      • Web usage and interfaces

      • Optimization of service architectures

      • Text Classification – support for document classification, routing, filtering

  • Presentation Focus

    • WWW challenges in designing effective services and applications.


  • Introduction2

    Introduction

    • Intersection

      • Browser Interface – Internet, Intranet, services, local drives.

      • Devices and applications: TabletPC, PDA, eBook

      • Services: MSN Portal and Search - on-line searching, reading, and browsing

    • Research:

      • Web usage and interfaces

      • Optimization of service architectures

      • Text Classification – support for document classification, routing, filtering

  • Presentation Focus

    • WWW challenges in designing effective services and applications.


  • Characteristics of the web

    Characteristics of the Web

    • Highly distributed: distributed data and processes

    • Highlydynamic

    • Evolving content, with still inadequate content publishing practice.

    IMPLICATIONS 


    On line experience

    On-line Experience

    • Web access is a combination of search and navigation

      • Search to find URL of relevant pages

      • Navigation to explore result space

      • Reading on devices of various display sizes.

    • Only limited “context” in both activities preserved and exposed

      • Ineffective search

      • Lost in hyperspace

      • Lost within a document, on small screen devices.


    Diagnoses

    ‘Diagnoses’

    • Three aspects of the Web

      • Separation of search and document delivery

      • Separation of document authoring and generation of metadata about the documents required by services and applications

      • Lack of generic publishing format to support flexible display of content across devices.


    Part i

    Part I

    Separation of search and document delivery

     Ineffective Search

    MIDAS - SiteExplorer


    Search processes

    Search processes

    Query

    User’s Information Need

    Search Engine

    URLs

    HTTP Request

    Web page delivery

    Web Server

    Web Server


    Highlighting how is it done

    Highlighting - How is it done ?

    Query

    User’s Information Need

    Search Engine

    URLs

    Topic Description

    HTTP Request

    MS READ Service

    Web Server

    Web Server

    Query syntactic Analysis

    Semantic Expansion

    Highlighting Regime

    Thumbnail Creation


    Link evaluation how is it done

    Web Server

    Link Evaluation - How is it done ?

    HTTP Requests for Text Only

    Download Text Only

    MS READ Service

    • NLP

    • Indexing

    • Search Over Local Index

    Topic

    Storage:

    Topic 1

    Topic 2

    Topic 3

    Topic 4

    Mark Links for Relevance


    Ms read

    MS Read

    • Users have difficulty locating relevant parts of a Web page while reviewing search results (MSN Search Diary and Field Interviews)

    • Users have difficulty evaluating search results and refining their search (Anne Cohen-Kiel’s ethnographic study in Spain, UK and Canada; MSN Search Diary Study and Site Interviews).

      Solution:

    • Preserve user’s topic of interest and provide highlighting of topic terms on the pages that the user is viewing.

    • Allow the users to enhance the topic by adding new query terms or resources (lists of concepts, entities, etc.) and perform search over the page content

    • Allow the user to search the content of the pages that are linkedto the current page.

      • When the page is the search result page, this is equivalent to refining the search over the previous top N search results.


    Msread supporting search

    MSRead – Supporting search


    Midas and siteexplorer

    MIDAS and SiteExplorer

    Part II

    Separation of document authoring and generation of metadataabout the documents required by services and applications

     User lost in the hyperspace


    Problem

    Problem

    • Crawling - Services, such as search engines, collect the data and create metadata but do not deliver the content

      • Out of sync with the data on the Web servers  ‘broken links’

    • Services can perform only basic analysis of the context

      • No information about structure of information resources

      • No sophisticated linguistic process.


    Solution midas framework

    Solution: MIDAS Framework

    • Distributed metadata generation

    • Generate & store meta-information alongside contents

      • At authoring or publishing time

      • Synchronised with publishing

    • Deliver metadata upon request

    • In case of centralized services

      • Services do not crawl for data but only for metadata

      • Obtain data through ‘push’ by authors/web servers.

    Site structure

    Page structure

    METADATA:Linguistic analysis

    Statistical analysis

    Visual representation


    Www challenges supporting users in search and navigation

    AUTHOR

    SERVER

    CLIENT

    Web Server

    Web Content

    Web Content


    Www challenges supporting users in search and navigation

    AUTHOR

    SERVER

    CLIENT

    Web Server

    Web Content

    Web Content

    Automatically Generated Metadata

    Web metadata (XML)

    Author generated metadata

    <dxf:views>

    <dxf:view title="Main">

    <dxf:node url="index.htm">

    <dxf:node url="aboutme.htm" />

    <dxf:node url="interest.htm" />

    <dxf:node url="favorite.htm" />

    <dxf:node url="photo.htm" />

    <dxf:node url="feedback.htm" />

    </dxf:node>

    </dxf:view>

    </dxf:views>

    SiteExplorer

    Metadata Server

    FrontPage Site Template and Structure in XML Format


    Midas is not

    MIDAS is NOT…

    …an element of the Semantic Web

    • Not adding “knowledge” explicitly into the Web

    • Simple metadata

      • Easily authored/easily computable at authoring/publishing time

      • Presently available but dismissed


    Problems addressed

    Problems addressed

    • Users have difficulty choosing the right website from the result set

      • Users want overviews of sites in a list of search results (Anne Cohen-Kiel’s ethnographic study in Spain, UK and Canada)

      • Users have difficulty evaluating search results and refining their search (MSN Search Diary Study and Site Interviews)

    • Users have difficulty locating relevant information within a destination site once they get to the site(MSN Search Diary Study and Site Interviews)

      Site Explorer’s Solutions:

      • Providing users with an overview of the site content as interactive sitemap

      • Supporting exploration of the site through local search


    Www challenges supporting users in search and navigation

    External studies

    “Anyone who has been to a shopping mall knows the value of the ‘you are here’ dot on the map …

    Site maps must become more aware of users’ website navigation…”

    Jakob Nielsen, Site Map Usability January 6, 2002


    Siteexplorer bar

    SiteExplorer Bar

    Search Box

    Site Overview

    Site Structure

    Page details


    Siteexplorer bar1

    SiteExplorer Bar

    Search Box

    Site Overview

    Site Structure

    Page details


    Smartview and searchmobil viewing web on pdas and mobile phones

    SmartView and SearchMobilViewing Web on PDAs and Mobile Phones

    Part III

    Lack of generic publishing format to support flexible display of content across devices

     Ineffective reading on mobile devices


    Lost in hyperspace small

    Lost in Hyperspace - Small

    • Complex pages on small screens

      • Overview

        – none provided at the moment

      • Extensive horizontal/vertical scrolling


    Lost in hyperspace small1

    Lost in Hyperspace - Small

    • Location of search hits on result page

      • Difficulty even on desktop screens

      • Reason: disassociation of search service and document delivery


    Smartview

    SmartView


    Smartview prototype

    SmartView Prototype


    Smartview plus

    SmartView Plus


    Searchmobil

    SearchMobil

    • SearchMobil Web Service

      • Collection of search results – “booklet” of Web pages

      • Creation of the “local” full text index

        • Search within a designated set of pages

      • Annotated booklets (hit highlighting)


    Www challenges supporting users in search and navigation

    SearchMobil Features

    • On-line search: Google

    • Automatic download of pages

    • Processing of pages – structure discovery and content indexing

    • Creation of a booklet of overviews

    • Indicators of search hits

    • Indicator of the best region – scroll down the ‘red’ section

    • Select the region and access the detailed view

    Web Search


    Www challenges supporting users in search and navigation

    SearchMobil Features

    • On-line search: Google

    • Automatic download of pages

    • Processing of pages – structure discovery and content indexing

    • Creation of a booklet of overviews

    • Indicators of search hits

    • Indicator of the best region – scroll down the ‘red’ section

    • Select the region and access the detailed view

    Web Search – Detail View


    Www challenges supporting users in search and navigation

    SearchMobil Features – Cont.

    • Local search – focussed on the set of pages in the booklet

    • Indicators of relevance at the page and the booklet level

    Local Search


    Searchmobil prototype

    SearchMobil Prototype


    Summary

    Summary

    • Simple proposition:

      Save metadata about structure and content generated by authoring applications

    • Benefits on the client side:

      • Rich context for search and navigation

      • Interactive download of document elements and metadata for small devices

    • Benefit for services:

      • Metadata collected and in s

      • Opportunity for new services based on rich metadata

      • Opportunity for push based services – reduce the need for crawling.


    Thank you

    Thank you!


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