Web Characterization Activity
Characterization Metrics
Editor:
Jim Pitkow, Xerox PARC
Last Updated:
Friday, December 18, 1998
This document contains a taxonomy of WWW specific metrics that can be characterized. The metrics are broken into the following areas:
Metrics for Client and Proxy Characterizations
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Realm |
Metric |
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Basic Facts |
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Classification of users (educational, home, ISP, or corporate) |
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Access method of users (LAN, modem, mobile, or wireless) |
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Users, response rate, and attrition rate. |
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Date and duration of study |
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Description and rational for any cleaning, filtering, etc. of data |
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Sampling methodology |
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Distributions |
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Entire Study ¾ User Centric |
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Files transferred per user |
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Unique files transferred per user |
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Pages transfer per user |
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Unique pages transfer per user |
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Sites visited per user |
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Unique sites visited per user |
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Reoccurrence rates for files, pages, and sites per user |
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Entire Study ¾ Web Centric |
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Embedded images per page |
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Mime-type percentage breakdown (e.g., html, jpg, ps, etc.) |
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Protocol percent breakdown (e.g., http, shttp, gopher, etc.) |
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Hyperlinks per page |
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Sessions ¾ General |
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Sessions per user |
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Sessions ¾ Temporal |
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Length of sessions per user |
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Inter-session time per user (session to session time) |
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Sessions ¾ Paths |
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Length of sessions per user |
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Stack distance per user |
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Per Session ¾ Temporal |
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Inter-request time per user (request to request time) |
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Intra-request time per user (request to render time) |
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Length of visit per site per user |
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Per Session ¾ Paths |
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Length of visit per site per user |
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Metrics for Server Characterizations
Please referrer to the following paper for the source of many of the metrics:
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Realm |
Metric |
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Basic Facts |
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Domain classification of server (.com, .edu, etc.) |
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Description of content contained on site |
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Cost to access material on site (free, pay-for-view, etc.) |
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Type of service provider (single server, virtual hosting, etc.) |
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Birth and modification history of server (major revisions of content) |
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Date and duration of study |
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Description and rational for any cleaning, filtering, etc. of data |
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Site Composition (one month) |
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Number of users |
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Number of files and page requests per user |
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Number of search engine hits |
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Number of files serviced |
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Number of pages serviced |
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Number of CGI/dynamic content serviced |
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Bytes transferred |
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Byte latency |
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Total number of files on server |
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Total number of pages on server |
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Documents by Traffic graph ( x% documents account for y% of traffic) |
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Growth Rates |
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Number of users |
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Number of files and page requests per user |
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Number of files serviced |
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Number of pages serviced |
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Number of CGI/dynamic content serviced |
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Bytes transferred |
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Byte latency |
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Number of files on server |
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Number of bytes on server |
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Doubling period for all of the above metrics |
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Distributions |
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Entire Server - User Centric |
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Files transferred per user |
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Unique files transferred per user |
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Pages transfer per user |
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Unique pages transfer per user |
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Reoccurrence rates for files and pages per user (assumes longitudinal tracking capabilities) |
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Entire Server ¾ Web Centric |
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Embedded images per page |
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Mime-type percentage breakdown (e.g., html, jpg, ps, etc.) |
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Hyperlinks per page |
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Longitudinal Sessions ¾ General |
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Sessions per user |
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Longitudinal Sessions ¾ Temporal |
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Length of sessions per user |
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Inter-session time per user (session to session time) |
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Longitudinal Sessions ¾ Paths |
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Length of sessions per user |
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Per Session ¾ Temporal |
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Inter-request time per user (request to request time) |
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Intra-request time per user (request to render time) |
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Length of visit at site per user |
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Per Session ¾ Paths |
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Stack distance per user |
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Length of visit at site per user |
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Metrics for WWW Characterizations
To be completed