mongodb import xml into mongodb

I have problem with importing big xml file (1.3 gb) into mongodb in order to search for most frequent words in map & reduce manner.

http://ift.tt/1Iris83

I know that I can't import xml directly into mongodb. I used some tools do so. I used some python scripts and all has failed.

Which tool or script should I use? What should be a key & value? I think the best solution to find most frequent world would be this.

(_id : id, value: word )

then I would sum all the elements like in docs example:

http://ift.tt/18wDe3N

Any clues would be greatly appreciated, but how to import this file into mongodb to have collections like that?

(_id : id, value: word )

If you have any idea please share.