A Taxonomy of Web Search

hurriedtinkleΤεχνίτη Νοημοσύνη και Ρομποτική

15 Νοε 2013 (πριν από 3 χρόνια και 4 μήνες)

59 εμφανίσεις


by
Andrei Broder , IBM Research


1

A Taxonomy of Web Search

Presented By


o
Onur Özbek


o
Mirun Akyüz

2

Introduction


Informational queries:


“the

perceived

need

for

information

that

leads

to

someone

using

an

information

retrieval

system

in

the

first

place”


Other

types

of

queries
:


Navigational


Transactional


A taxonomy of web searches

3

The Classic Model

Fig. 1: The classic model for IR, augmented for the web.


User has a task


Verbalizes
information need


Verbal form is
ransformed into
a query


Search engine
returns a
selection from the
corpus based on
the query

4

A Taxonomoy of Web Searches


3 classes of web queries:


Navigational


Reach a particular URL


Informational


Find information


Transactional


Perform a web
-
based activity


No certain way to infer intent from a query

5

A Taxonomoy of Web Searches


Navigational queries:


Web site previously
-
visited or assumed to exist


eg.

türk hava yolları


http://www.turkishairlines.com


Also known as “known item” search


Usually one right result


eg.

sony


http://www.sony.com


(Sony USA)


http://www.sony.co.uk


(Sony UK)


http://www.sony.net


(Sony Global)


Hub results less preferrable

6

A Taxonomoy of Web Searches


Informational queries:


Information available in a static form


Reading as the only further user interaction:


Classic IR


Can be extremely wide:


eg.

cars


Or narrow:


eg.

Volkswagen Beetle


For 15% of searches, a hub target desired

7

A Taxonomoy of Web Searches


Transactional queries:


Further interaction with the websites in results:


Shopping


Web
-
mediated services


File download (images, songs, videos, etc.)


Access to a certain DB (eg. Yellow Pages)


Difficult to evaluate


Possibly limited by binary judgement


External factors (eg. price) not available to the search
engine

Statistics


User survey


Random users with %10 response (3190 people)


Survey questions:

Navigation/Non
-
navigation
-
>

(24.5%)


Transactional


/Information queries
-
>

(23.8%)







8

Statistics


Log Analysis


Queries : transactional, navigational, informational


English queries

9

Evolution of Sea
r
ch Engines


First generation: (
Informational)


on
-
page data (text and

formatting)


Second generation:
(informational & navigational)


off
-
page, web
-
specific data:



link analysis, anchor
-
text, click
-
through data


Third generation:
(informational, navigational, transactional)


blend data from multiple sources :


Query: “San Francisco”

-
> semantic analysis, context determination, dynamic data base
selection

10

Conclusion


Understanding of Taxonomy



Informational and Navigational queries






Transactional queries




(
semantic analyses, blending external data bases)

11

A Taxonomy of Web Search

By Onur Özbek & Mirun Akyuz

12