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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, 11:47 PM

Where the unread columns are

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.

Average Class Size 2017-2019 (Preliminary)

cfuy-6eha

← What we have understood · Dataset page

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
number_of_students Number of Students	Number	Understood	quantity.persons Count of persons	dictionary_read The total number of students	—
district District	Text	Understood	place.school_district Community School District	dictionary_read NYC school district	school_district
number_of_classes Number of Classes	Number	Checked, no match	—	value_profile The total number of classes offered for a course	—
minimum_class_size Minimum Class Size	Text	Understood	quantity.persons Count of persons	dictionary_read The number of students	—
average_class_size Average Class Size	Number	Checked, no match	—	dictionary_read The average number of students in a class	—
month Month	Text	Checked, no match	—	dictionary_read Month and year combination indicating whether the report is preliminary (November) or updated (February)	—
grade_level Grade Level	Text	Understood	category.classification Publisher classification	dictionary_read The grade level for which the course is offered	—
maximum_class_size Maximum Class Size	Text	Understood	quantity.persons Count of persons	dictionary_read The number of students	—
school_year School Year	Text	Understood	time.fiscal_period Fiscal or school period	dictionary_read School Year of the report	—
geography Report Type	Text	Understood	category.classification Publisher classification	dictionary_read Indicates the level of aggregation (Borough, Citywide, District, School)	—
borough Borough	Text	Checked, no match	—	value_domain_read	—
school_name School Name	Text	Checked, no match	—	value_domain_read Home Schooling×1820	—
department Department	Text	Understood	category.classification Publisher classification	dictionary_read Denotes course department	—
subject Subject	Text	Understood	category.classification Publisher classification	dictionary_read Denotes course subject	—
program_type Program Type	Text	Understood	category.classification Publisher classification	dictionary_read Identifies program type for course	—
dbn DBN	Text	Understood	identifier.school_dbn School DBN	value_profile concatenating the school district code, the school borough code, and the school number	—