doc = {
'tags' : {
'name=A440',
'highway=secondary',
'oneway=yes'
}
);
db.poi.createIndex( { 'tags' : 1 } );
// Road with name=Strand
db.poi.find( { 'tags' : 'name=Strand' } );
// All roads
db.poi.find( { 'tags' : /^highway=/ } );