Plural of Schema
“Schema” has two dictionary-recorded plurals: “schemata” and “schemas.” Cambridge and Merriam-Webster both record both forms. Present them as accepted alternatives unless a field, house style, or software/documentation convention requires one. This general lexical task is separate from formatting rules for XML schema elements or other specialist markup.
Both “schemata” and “schemas” are accepted plurals of “schema.”
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| one schema | schema | Singular. |
| more than one | schemata | Accepted plural. |
| more than one | schemas | Also accepted. |
Quick tests
Plural-choice test
Are you referring to more than one schema?
If yes: Use accepted “schemata” or “schemas,” subject to style/context.
If no: Use singular “schema.”
Caveat: Specialist documentation may establish a local preference, but that does not erase the general dictionary acceptance of both forms.
Examples
The paper compares several cognitive schemata.
“Schemata” is an accepted plural.
The database uses multiple schemas.
“Schemas” is also accepted.
This schema describes the data model.
One takes singular “schema.”
Further guidance
Core difference
Use either “schemata” or “schemas” as an accepted plural of “schema,” subject to local style.
Fast Test
If a technical or house style mandates one form, follow it; otherwise both are dictionary-recorded.
Usage Boundary
Do not label one form incorrect merely because another is preferred in a particular discipline.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- SCHEMA | English meaning - Cambridge Dictionary (opens in a new tab)Cambridge University Press · Cambridge records schemata or schemas as plurals of schema.
- SCHEMA Definition & Meaning - Merriam-Webster (opens in a new tab)Merriam-Webster · Merriam-Webster records plural schemata and also schemas.