12. A system, comprising: a processor configured to: receive, from a non-transitory computer readable media, a block of text that includes at least one topic; identify the at least one topic associated with the block of text, the identification comprising a comparison of each portion of a plurality of portions of the block of text to a topic listing of a plurality of topics; identify one or more categories for each of the identified topics, the identification of one or more categories comprising a comparison of each of the identified topics to a hierarchical category graph that includes a mapping of topics to categories; determine unique categories across the one or more categories for each of the topics, the unique categories selected from the identified one or more categories, wherein each unique category is an identified category associated with at least one portion of the plurality of portions of the block of text, the unique categories acting as a unique identifier of the block of text; associate each unique category with M levels of parent categories of each unique category and N levels of child categories of the unique category; determine category graph data for the block of text including each unique category, the category graph data identifying the M levels of parent categories for each unique category, and the N levels of child categories for each unique category; determine a connected category count for a unique category based on the category graph data, the connected category count indicating a number of unique categories connected to the parent categories in the M levels and connected to child categories in the N levels as identified in the category graph data; and determine one or more filtered categories from the unique categories based on the connected category count for the unique category and one or more other connected category counts for one or more other unique categories.
12. A system, comprising: a processor configured to: receive, from a non-transitory computer readable media, a block of text that includes at least one topic; identify the at least one topic associated with the block of text, the identification comprising a comparison of each portion of a plurality of portions of the block of text to a topic listing of a plurality of topics; identify one or more categories for each of the identified topics, the identification of one or more categories comprising a comparison of each of the identified topics to a hierarchical category graph that includes a mapping of topics to categories; determine unique categories across the one or more categories for each of the topics, the unique categories selected from the identified one or more categories, wherein each unique category is an identified category associated with at least one portion of the plurality of portions of the block of text, the unique categories acting as a unique identifier of the block of text; associate each unique category with M levels of parent categories of each unique category and N levels of child categories of the unique category; determine category graph data for the block of text including each unique category, the category graph data identifying the M levels of parent categories for each unique category, and the N levels of child categories for each unique category; determine a connected category count for a unique category based on the category graph data, the connected category count indicating a number of unique categories connected to the parent categories in the M levels and connected to child categories in the N levels as identified in the category graph data; and determine one or more filtered categories from the unique categories based on the connected category count for the unique category and one or more other connected category counts for one or more other unique categories. 20. The system of claim 12 , wherein the processor is further configured to determine one or more filtered topics for the block of text based on the one or more filtered categories by accessing classification data defining a classification system including topics and associated categories.