http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Same data on eligible organizations that was previously searched for using electronic Pub. 78."
"The Auto-Revocation List and Pub. 78 data will both be updated monthly, on the third Monday of each month. Form 990-N (e-Postcard) data will continue to be updated weekly."
Income tax deductions for charitable contributions
Charitable uses, trusts, and foundations
Cumulative list of organizations described in section 170 (c) of the Internal Revenue Code of 1954