code: function(layerContext, node) {
          var srs    = this.getChildValue(node);
          if (typeof layerContext.projections != "object") {
              layerContext.projections = {};
          }
          var values = srs.split(/ +/);
          for (var i=0, len=values.length; i<len; i++) {
              layerContext.projections[values[i]] = true;
          }
      }
docs: Method: read_wmc_SRS