Information Retrieval

In unit one, we are introduced to the concept of the inverted index as a fundamental technology in information retrieval systems. The inverted index essentially is an index of words known as terms extracted from the document corpus that can be searched to find documents with the content that the user is looking for. Our text also introduces two extensions to the concept of the inverted index, the biword index and the positional index.

For your discussion assignment:

Select either the biword index or positional index

a. Provide a description of the index that you selected. As part of your description make sure that you describe why and how it is different than the inverted index.

b. Describe both where and when the index would it be used

c. Describe the advantage the index has over the inverted index