14.07.2015 | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 1 del.icio.us Knowledge Management in Web.

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| Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 1 del.icio.us Knowledge Management in Web 2.0

Delicious Overview  What is Delicious?  Bookmarking And Navigation  Delicious Folksonomy  Potential Applications with Delicious  Other Social Bookmarking Systems | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 2

| Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 3 What is Delicious?  Online Social Bookmarking Service  5 million users (July 2008)  Motivation  Many web bookmarks  Users working with several PC’s  … working with different browsers  How to organize, share and provide access to bookmarks?  Main Features:  Bookmark storing  Tagging  Explore-Browse/Search  Social Collaboration

What is Delicious? | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 4

Bookmarking And Navigation  How to do the Tagging/Bookmarking?  Browser toolbar  Bookmarklets  How to find bookmarks and tags?  Stored in user account  Browsing other user‘s bookmarks  Exploring tags  Search textfield | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 5

Adding Content | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 6

Adding Content | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 7 Any URL your browser can open

Adding Content | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 8 Title

Adding Content | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 9 Notes

Adding Content | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 10 Tags

Delicious Folksonomy | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 11 Folksonomy = Folk + Taxonomy

Delicious Folksonomy – The Folk | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 12 According to alexa.com

Delicious Folksonomy – The Folk | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 13 According to alexa.com

Delicious Folksonomy – The Taxonomy  As a result of Collaboration (from Folk)  Professional author  „Non professionals“  Collaborating is easy and has no costs  Community classification  As items get tagged and  A tag structure is generated  Flat hierarchy  For example, no explicit parent-child relationship  But related tags can be generated  „Semantics“ given by tags | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 14

Delicious Folksonomy – Some Issues  Ambiguity  Classical example: „ANT“  Java building tool?  Insect?  Another example: „fishbone“  One solution is to filter by popularity or actuality  Single words!  „newyork“, „semanticsimilarity“  Synonyms  No control over synonyms  Tag count may expand as a result  But it may help finding an Bookmark easily | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 15

Delicious Folksonomy – Some Issues  Feedback  Almost instant  Is that tag correct?  If not, changing tags can be done easily  Conversations  Photographic conversation: „sometaithurts“ -> so meta it hurts  How to deal with dead links?  No screenshots are saved by delicious  But dead links are probably not popular anymore | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 16

Potential Applications with Delicious  Market Reasearch  Based on Popular Bookmarks  What are the trends?  Based on Tags  „wishlist“, „toread“, „buy“, „purchase“  Tags can also be used to identify market size  Tags also reflect people‘s vocabulary  Integration with current search engines  Improved search results  by using Knowledge-based methods  by expanding the search queries with similar tags | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 17

Other Popular Social Bookmarking Systems | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 18

Deliciously? | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 19

Delicious Thanks for your attention! Any questions? | Computer Science Department | Ubiquitous Knowledge Processing Lab | © Prof. Dr. Iryna Gurevych | 20