How to index short sentences for similarity search?

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1

I have a huge dataset, each document is the dataset contains some lines of short sentences.

My problem is: Given a document, I need search similar documents based on the threshold of how many percentage of short sentence are same. For example, if the threshold is 25%, then if the 25% of short sentences are same in two documents, they are thought similar.

My question is:
How should index the documents, and what similarity algorithm should be used? Thanks in advance for any suggestions and feedbacks.

2

If you need exact match of such short sentences, you may use keyword fields and More like this query on that field. How about it??

3

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