Comp Sci Creating index vs adding document to index differences

[shivajikobardan]

Homework Statement

Lucene indexing

Relevant Equations

none

These are the steps of indexing in Lucene given in our syllabus-:

The first step says that it is creating an index whereas the last step says that it's adding document to index.
What's the difference between these two? Can I get an example.

Here's what I think it should happen-:
1) Collect all words from each documents. Lists it like-;

doc1=>word1,word2,WORD3….wordn
doc2=>word1,WORD2,word3….wordn
And so on.

2) Analyse the words and remove various types of words as per analyzer, process them as per analyzer.

Say now what remains is-:
doc1=>word1,word3,...word(n-1)
doc2=>word2,...word(n-3)

3) Done. Now you can make inverted index as well by converting this to inverted index.

But it's done bit differently, which I'm not 100% clear about.

 

[pbuk]

whereas the last step says that it's adding document to index.

No it doesn't, what you are calling the "last" step simply creates a document; adding it to the index is another step.

What's the difference between these two? Can I get an example.

Can you get an example of the difference between creating a thing and adding something to that thing? Are you serious?

Here's what I think it should happen-:
...

This is all done behind the scenes, you don't have to worry about any of this to use Lucene, you just need to learn how to use the API. A good place to learn that is the API documentation itself: https://lucene.apache.org/core/9_2_0/core/index.html