<commit_before>var   express     = require('express')
    , grainstore  = require('grainstore')
    , RedisPool   = require('redis-mpool')
    , LocalizedResourcePurger = require('./cache/localized_resource_purger')
    , MapStore    = require('./mapstore')
    , MapConfig   = require('./mapconfig')
    , _           = require('underscore')
    , mapnik      = require('mapnik')
    , Step        = require('step')
    , semver      = require('semver')
    , Profiler    = require('./stats/profiler_proxy')
    , PSQL        = require('cartodb-psql')
    , StatsClient = require('./stats/client')
;

// Some regular expressions that are better compiled once
var mapnikTokens_RE = /!bbox!|!pixel_width!|!pixel_height!/;

var WELCOME_MSG = "This is the CartoDB Maps API, see the documentation at http://docs.cartodb.com/cartodb-platform/maps-api.html";<commit_msg>Adds scale_denominator to the regex for validating attributes<commit_after>var   express     = require('express')
    , grainstore  = require('grainstore')
    , RedisPool   = require('redis-mpool')
    , LocalizedResourcePurger = require('./cache/localized_resource_purger')
    , MapStore    = require('./mapstore')
    , MapConfig   = require('./mapconfig')
    , _           = require('underscore')
    , mapnik      = require('mapnik')
    , Step        = require('step')
    , semver      = require('semver')
    , Profiler    = require('./stats/profiler_proxy')
    , PSQL        = require('cartodb-psql')
    , StatsClient = require('./stats/client')
;

// Some regular expressions that are better compiled once
var mapnikTokens_RE = /!bbox!|!scale_denominator!|!pixel_width!|!pixel_height!/;

var WELCOME_MSG = "This is the CartoDB Maps API, see the documentation at http://docs.cartodb.com/cartodb-platform/maps-api.html";
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