Two things about meta_names / meta_addresses have to be settled before
either is trusted as a variant source, and both are visible in the first rows
of the files:
Details
ORG_NAME_ALLis comma-concatenated and appears truncated. The first data row reads"SECOND BAPTIST CHURCH, PALMER SECOND BAPTIST CHURCH, PALMER SECOND BAPTIST CHU"- several names joined by commas, with the last one cut mid-word. Splitting on the comma is ambiguous because organisation names contain commas, and a truncated tail would enter the database as a name that never existed. Quantify the truncation rate before ingesting; a variant source that invents strings is worse than no variant source.ORG_ADDRESS_ALLis comma-joined asstreet,city,state,zip, which collides with commas inside street lines. Preferaddress_resolved_crosswalk, which has already done this parse and records each address spell as its own row with a vintage range.
EIN2 is not a defect - it is the canonical identifier for this project.
See md_ein(). An earlier revision of this note had that backwards.