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First I need to programmatically get tags (unlike what is done here on stackoverflow) from the titles and descriptions of my posts. I don’t want commonly used words to appear in keywords. Is there an efficient way of doing this?
After getting good tags, I would like to save them in MySQL DB.
Now, how do I efficiently get related posts using these automatically created tags? E.g. What is done here.
Look up tf-idf. You’re looking for terms with a high tf-idf score.