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Coverage

56,681 of 56,681 columns decided — 100.0% · 12,642 bound (22.3%) · 0 still unread

Bound: 12,642; 22.3%; a concept was found and asserted for the column.
Refused: 32,953; 58.1%; the column was read and no concept fits. A verdict, not a gap.
Insufficient: 11,086; 19.6%; read, but the evidence did not settle it.
Unanalysed: 0; 0.0%; nobody has read this column yet.

56,681 columns in the coverage ledger · read from /api/field-coverage on citytap-prod · source last observed Oct 10, 2026, 11:51 PM

3,026 datasets, 56,681 catalogued fields, 0 of them still unread. Every band below is a share of that, worst first. Open one to see its datasets.

J-51 Exemption and Abatement (Historical)

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Fields catalogued

Understood

Checked, no match

Nobody has looked

Every field decided — Every field carries a verdict — which does not mean every field is understood.

Every field in this dataset

Covered and uncovered alike, in the order the publisher lists them. A field with no verdict is one nobody has looked at yet.

Field	Type	What we know	Meaning	How it was decided	Shared term
qtr QTR	Text	Checked, no match	—	value_domain_read top[4]={3×849228; 2×619181; 4×590826; X×476}	—
amt_remain AMT_REMAIN	Number	Not enough to tell	—	dictionary_read_underspecified	—
b Borough Code	Number	Understood	place.borough Borough	value_profile Borough where property is located	borough
tax_year TAX_YEAR	Number	Not enough to tell	—	dictionary_read	—
abatement ABATEMENT	Number	Understood	quantity.money Monetary amount	dictionary_read_underspecified Total tax amount	—
total_tax TOTAL_TAX	Number	Understood	quantity.money Monetary amount	dictionary_read_underspecified Total tax amount	—
abate_grant ABATE_GRANT	Number	Understood	quantity.money Monetary amount	dictionary_read_underspecified Total tax amount	—
ab_pct AB_PCT	Number	Checked, no match	—	value_domain_read smallest=0.031 largest=0.129	—
e Easement	Text	Not enough to tell	—	value_profile	—
block BLOCK	Number	Checked, no match	—	value_domain_read smallest=00006 largest=16250	—
cost_of_alt COST_OF_ALT	Number	Understood	quantity.money Monetary amount	dictionary_read_underspecified Total tax amount	—
lot LOT	Number	Checked, no match	—	value_domain_read smallest=00006 largest=16250	—
init_year INIT_YEAR	Number	Not enough to tell	—	value_domain_read	—
ex_years EX_YEARS	Number	Checked, no match	—	dictionary_read The number of years for the exemption	—
exempt_amt EXEMPT_AMT	Number	Understood	quantity.money Monetary amount	dictionary_read_underspecified Amount remaining	—