SEO arrow Resources arrow Glossary

Sales & Support

Freephone
UK: 0800 047 0991
Ireland: 1800 550 444
China:+86 27 887 20307
International
+353 74 910 1762
more SEO Contacts »

Your Basket

Show Cart
Your Cart is currently empty.

Your SEO Account

User name

Password



Forgotten your password?
No account yet? Create one

SEO Newsletter

SEO Newsletter


Receive HTML?


SEO Glossary of Terms
A Glossary of Terms relating to search engine optimisation (seo)
Glossary Search:

Begins with Contains Exactly matches
View Glossary
Submit Term



Inverse document frequency (IDF)

IDF or Inverse Document Frequency is vector space model term which is used when determining the position of a term within the model. This basically means that it is the measure of how rare a term is when it is compared to the other documents within the same grouping.