2. The method of claim 1 , wherein the neural network classifier is configured to: process the alternative representation of the input to generate a respective category score for each of the plurality of categories, wherein each of the respective category scores measures a predicted likelihood that the resource belongs to the corresponding category.
2. The method of claim 1 , wherein the neural network classifier is configured to: process the alternative representation of the input to generate a respective category score for each of the plurality of categories, wherein each of the respective category scores measures a predicted likelihood that the resource belongs to the corresponding category. 5. The method of claim 2 , further comprising providing the category scores to a search system for use in generating and ordering search results in response to received search queries.