The standard exports and filters for IPEDS classification are calculated from three Slate-Standard fields and prompts: Citizenship, Race, and Hispanic. Since IPEDS doesn't consider the race or ethnicity of international students, all international students are given an IPEDS classification of Nonresident Alien, regardless of race or ethnicity.
Slate uses a SQL statement to calculate an applicant's IPEDS classification. In plain English, the steps of that statement are:
If the Citizenship Status = "FN" (Foreign National), then export "Nonresident Alien"
If the "Hispanic" field is set to "Yes", then export "Hispanic of any race"
Store raw data (Citizenship, Race, Hispanic), then use standard exports and filters to calculate the IPEDS classification.