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Towards Semantic Web Mining. Bettina Berndt Andreas Hotho Gerd Stumme. Semantic Web Mining. Combination of Semantic Web and Web Mining Improve Web Mining using Semantic Web Improve Semantic Web using Web Mining. Overview. Web Mining Extracting Semantics from the Web

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Towards Semantic Web Mining

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Towards Semantic Web Mining

Bettina Berndt

Andreas Hotho

Gerd Stumme


Semantic Web Mining

  • Combination of Semantic Web and Web Mining

  • Improve Web Mining using Semantic Web

  • Improve Semantic Web using Web Mining


Overview

  • Web Mining

  • Extracting Semantics from the Web

  • Exploiting Semantics for Web Mining

  • Mining the Semantic Web

  • Closing the Loop

  • Conclusion/Assessment


Web Mining

  • Discovers Local and Global Structure

  • Structured Data

  • Goals

    • Improvement of site design

    • Generate dynamic recommendations

    • Improve marketing

  • Main Areas

    • Web Content Mining

    • Web Structure Mining

    • Web Usage Mining


Content Mining

  • Type of Text Mining

  • Uses Tags

  • Detect co-occurrences

  • Event detection

  • Reconstruction of page content

  • Relations in a domain


Web Structure Mining

  • WebPages as a whole

    • Uses hyperlinks

    • Identify relevance

  • Single Pages

    • Five types of Web Pages

      • Head Pages

      • Navigation Pages

      • Content Pages

      • Look up Pages

      • Personal Pages


Web Usage Mining

  • Request by Visitors

  • Additional Structure

  • Unintended Relationships


Web Mining


Disadvantages of Web Mining

  • Content/Structure

    • False positives

    • Unused

    • Human understandable

    • Large amount of data

  • Usage

    • Usage tracked by urls

    • General concepts

    • Multiplicity of events and urls


  • cooperateswith(X,Y)

  • cooperateswith(Y,X)

TOP

NAME

PERSON

PERSON

TITLE

PROJECT

COOPERATES

COOPERATES

--

--

WITH

WITH

Ontology

WORKS-IN

RESEARCHER

RESEARCHER

Semantic Web Mining

Andreas Hotho

WORKS-IN

DAMLPROJ

URI-SWMining

-

Relational

Metadata

URI-AHO

WORKS-IN

COOPERATES

COOPERATES

-

-

WITH

WITH

URI-GST

WWW


Outline

  • Web Mining

  • Extracting Semantics from the Web

  • Exploiting Semantics for Web Mining

  • Mining the Semantic Web

  • Closing the Loop

  • Conclusion/Assessment


Extracting Semantics

  • Ontology Learning

    • Learn structures of Ontologies

  • Instance Learning

    • Populates the Ontologies


Extracting Semantics

  • Ontology Learning

    • Semi-automatic approach

    • Merging

      • FCA-Merge

      • TITANIC

  • Instance Learning

    • Information Extraction


Outline

  • Web Mining

  • Extracting Semantics from the Web

  • Exploiting Semantics for Web Mining

  • Mining the Semantic Web

  • Closing the Loop

  • Conclusion/Assessment


How can the semantic web help

with web mining ?


Web Content/Structure Mining

  • Content Mining

    • Preprocess the input data

    • Apply heuristics

    • Creates a cluster

  • Web Structure Mining

    • Page Rank

    • Keyword Analysis

    • CLEVER


Conceptual Clustering of Emails (and Bookmarks)

using IE and Formal Concept Analysis for supporting navigation and retrieval.


Web Usage Mining

  • Goal

    • Better understand user’s tendencies

  • Problem

    • Dynamic pages

    • How to take advantage of this?

      • Generate queries

      • Create usage paths

      • Classification scheme


Advantages

  • Structured Model

  • Improve queries

    • Analyze single pages

    • Analyze ontologies

    • Users history


Outline

  • Web Mining

  • Extracting Semantics from the Web

  • Exploiting Semantics for Web Mining

  • Mining the Semantic Web

  • Closing the Loop

  • Conclusion/Assessment


How can web mining help

build the semantic web?


Semantic Web/Structure Mining

  • Intertwined

  • Relational Data Mining

    • Looks for patterns

    • Classification, regression, clustering and associations

    • Challenges

      • Scalability

      • Distributed


Semantic Web Usage Mining

  • Goal

    • Requested page = ontology entity

    • Log files

  • Advantages

    • Understand search strategies

    • Improve navigation design

    • Personalize


Outline

  • Web Mining

  • Extracting Semantics from the Web

  • Exploiting Semantics for Web Mining

  • Mining the Semantic Web

  • Closing the Loop

  • Conclusion/Assessment


Mining to Learn Ontologies

  • Establish a concept hierarchy

    • OntEx

  • Determine Association rules

    • Discover combinations of concepts


Mining to Learn Ontologies


Filling the Ontologies


Use Ontology to Mine


Conclusion/Assesment

  • Semantic Structures in the Web can help Web mining

  • Web Mining can build the Semantic Web

  • Combine the two together

  • Different Idea

  • Combination of Products


Questions?


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