python csv reader - http://docs.python.org/2/library/csv.html

python dictionaries - https://docs.python.org/2/tutorial/datastructures.html#dictionaries

json tutorial - http://www.json.org/

json tutorial - http://www.w3schools.com/json/

csv reader - https://docs.python.org/2/library/csv.html#csv.reader

xml tutorial - http://www.tizag.com/xmlTutorial/index.php

xml w3schools - http://www.w3.org/TR/xml/#sec-origin-goals

xml w3schools - http://www.w3schools.com/xsl/default.asp

python and xml - https://wiki.python.org/moin/PythonXml

BeautifulSoup - http://www.crummy.com/software/BeautifulSoup/bs4/doc/

BeautifulSoup - http://programminghistorian.org/lessons/intro-to-beautiful-soup

BeautifulSoup - http://web.stanford.edu/~zlotnick/TextAsData/Web_Scraping_with_Beautiful_Soup.html

php arrays - http://php.net/manual/en/language.types.array.php

ruby hashes -http://www.tutorialspoint.com/ruby/ruby_hashes.htm

NoSql wiki - https://en.wikipedia.org/wiki/NoSQL

DBpedia - http://dbpedia.org/Datasets#h338-1

Pymongo installation - http://api.mongodb.org/python/current/installation.html

Mongo import documentation - http://docs.mongodb.org/manual/reference/program/mongoimport/

Mongo bulk inserts - http://api.mongodb.org/python/current/tutorial.html#bulk-inserts

Regex tester - http://regexpal.com/

Regex definition - http://docs.mongodb.org/manual/reference/operator/query/regex/

Regex documentation - https://docs.python.org/2/howto/regex.html

Regex Google - https://developers.google.com/edu/python/regular-expressions?csw=1

Python list pass-by-reference - http://robertheaton.com/2014/02/09/pythons-pass-by-object-reference-as-explained-by-philip-k- dick/

group operator - http://docs.mongodb.org/manual/reference/operator/aggregation/group/

Aggregation operators - http://docs.mongodb.org/manual/reference/operator/aggregation/

indexes - http://docs.mongodb.org/manual/indexes/

incremental parsing - http://effbot.org/elementtree/iterparse.htm#namespace-events

openstreetmap wiki - http://wiki.openstreetmap.org/wiki/Main_Page

osm xml file format -http://wiki.openstreetmap.org/wiki/OSM_XML