title: documentation on how to build complex queries for AWS dynamodb for an iOS Application
body: <p>I'm trying to create an application in which a database of users is queried with a relatively complex set of query parameters.  I've found basic documentation on how to query using the aws mobile sdk (<a href="http://docs.aws.amazon.com/mobile/sdkforios/developerguide/dynamodb_om.html" rel="nofollow">http://docs.aws.amazon.com/mobile/sdkforios/developerguide/dynamodb_om.html</a>) but am not sure how to perform more complex operations (i.e. multiple query conditions at the same time).</p>
  
  <p>As an example if I want to query the database for users containing certain values in a list attribute and who fall within a certain lat and lon attribute, how could I do that?</p>
  
  <p>Perhaps this may not be possible with dynamo, but if not then which database type should I use and where would the documentation for forming these multipart queries in iOS be?</p>
  
  <p>Thanks</p>