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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, 10:10 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.

Class Size Report Distribution Summary (2010-2015)

9ksk-35jf

← 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
grade_level GRADE LEVEL	Text	Understood	category.classification Publisher classification	dictionary_read The student’s grade level.	—
percent_of_students_in_borough PERCENT OF STUDENTS IN BOROUGH / GRADE / PROGRAM / SUBJECT	Number	Checked, no match	—	dictionary_read This metric represents the proportion of students who are enrolled	—
csd CSD	Text	Understood	place.school_district Community School District	value_domain_read	school_district
core_subject CORE SUBJECT	Text	Understood	category.classification Publisher classification	dictionary_read Subject of Instruction	—
class_size CLASS SIZE	Text	Checked, no match	—	value_domain_read card=33 nonnull=2701 null=0 smallest=10 largest=9 top[8 of 20]={15×139; <15×111; 30×110; 27×109; >34×108	—
service_category SERVICE CATEGORY	Text	Checked, no match	—	value_domain_read top[8 of 9]={-×56066; 1899-12-31T12:01:01.000×1802; 1899-12-31T12:01:00.000×1422	—
borough BOROUGH	Text	Understood	place.borough Borough	value_domain_read	borough
program_type PROGRAM TYPE	Text	Understood	category.classification Publisher classification	dictionary_read The types of classes students are enrolled in.	—
number_of_classes NUMBER OF CLASSES	Number	Checked, no match	—	value_profile Count of Official Classes or Courses	—
number_of_students NUMBER OF STUDENTS	Number	Understood	quantity.persons Count of persons	dictionary_read Number of students	—
school_year SCHOOL YEAR	Text	Understood	time.fiscal_period Fiscal or school period	dictionary_read School Year of the report	—
report_type REPORT TYPE	Text	Understood	category.classification Publisher classification	dictionary_read Indicates the level of aggregation	—