Data reference

The files#

Every field of each file is listed in the REST API reference. All files are served from https://ntumods.com.

Semester codes#

• A semester is written year_semester, such as 2026_2. The year is the academic year, so 2026 is AY2026/27.
• The semester is 1, 2or S (special term). Older files, up to 2021, also have T for the second special term.
• The newest semester with classes and the newest with an exam timetable are often different. Exams are published later, so an exam file can be empty ({}) for a new semester.

How the files join#

• The module code is the key in every file. Use it to go from a row in modules.json to its class indexes and exam.
• A class index is one group of classes a student picks, such as a lecture with one tutorial. It has a number, such as 10052, and a list of class slots. A student picks one index per module.
• Index numbers are text and are unique within a semester, not across semesters.

Class slots#

{  "key": "10052",  "type": "LEC",  "group": "SCL1",  "day": 3,  "time": "0930-1120",  "venue": "LT3",  "remarks": "Teaching Wk1-9,11-13",  "duration": 4}

• type is LEC, TUT, LAB, SEM and a few rarer ones such as PRJ and DES.
• day counts from 1 for Monday to 6 for Saturday. A few slots have 0, which means online or to be announced, with no fixed time.
• time is HHMM-HHMM on a 24 hour clock, with no colon and no time zone. It is Singapore time.
• duration is in half hours, so 4 is two hours.
• remarks is NTU's own note and is empty when there is none. It often gives the weeks the class runs, such as Teaching Wk2-13, or alternate weeks such as Teaching Wk2,4,6,8,10,12. It is free text, so do not rely on parsing it.

Exams#

{  "key": "SC1004",  "name": "LINEAR ALGEBRA FOR COMPUTING",  "date": "23 November 2026",  "day": 1,  "start_time": "5.00 pm",  "end_time": "7.00 pm",  "duration": 4}

• date, start_time andend_time are text as NTU writes them. Times use a dot, as in9.00 am, not a colon.
• day counts from 1 for Monday to 7 for Sunday, and duration is in half hours.
• Venues and seats are not published in this data.

Module records#

• au is a number in /api/modules/{code} and text, such as "3.0", in modules.json.
• prerequisites is a list of groups. Every group must be met, and any one module in a group meets it. In the example below you need (MH1812 or SC1007) and (SC1007 or SC1124). A code with a suffix, such as SC1003(Corequisite), may be taken at the same time.
• requires flattens the groups, and requiredBy lists the modules that need this one.
• categories uses COREfor programme core, GLOAD for BDE, MLOAD for a minor,GERP for general education, and a few others.
• The restrictions fields are free text exactly as NTU publishes them, or null. description, gradeType and school can also be null. Lists are empty, not null.
• exam is null when no exam timetable is published for the latest offering.

"prerequisites": [["MH1812", "SC1007"], ["SC1007", "SC1124"]]