From cdec Decoder
Weights files (--weights FILE) specify the features and the weights used by the decoder. They consist of name value pairs separated by a single space. Names may consist of a mixture of letters, numbers, and some symbols, and weights must be a numeric value. The name of the feature is determined by the implementer of the FeatureFunction interface.
LanguageModel 2.1592 WordPenalty -3.5271 Glue -0.3543 F1000001 -0.000160 F1000002 0.0004135 F1000003 -0.0001197 F1000004 -0.0001688