Patent Document ID: 8484245
Application ID: 13022766

Base Claim:
1. A non-transitory storage medium storing instructions executable by a processing device to perform a method comprising: generating a hierarchical classifier for a taxonomy of hierarchically organized categories wherein each category is represented by one or more textual category descriptors, the hierarchical classifier being generated by a method including (i) constructing queries from the textual category descriptors representing the categories and querying a documents database using the constructed queries to retrieve pseudo-relevant documents and (ii) extracting language models comprising multinomial distributions over the words of a textual vocabulary for the categories of the taxonomy by inferring a hierarchical topic model representing the taxonomy from at least the pseudo-relevant documents; and classifying an input document different from the pseudo-relevant documents using the generated hierarchical classifier, the classifying comprising inferring mixture weights for a mixture of the extracted language models to approximate the multinomial distribution of words of the input document over the words of the textual vocabulary.

---

Claim 4:
4. The non-transitory storage medium as set forth in claim 1 , wherein the querying of a documents database comprises at least one of (i) inputting the constructed queries to an Internet search engine without any domain restriction, and (ii) inputting the constructed queries to an Internet search engine with a domain restriction.