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---
id: schema-annotations
title: Annotations
---
Schema annotations allow attaching metadata to schema objects like fields and edges and inject them to external templates.
An annotation must be a Go type that is serializable to JSON raw value (e.g. struct, map or slice)
and implement the [Annotation](https://pkg.go.dev/github.com/facebook/ent/schema/field?tab=doc#Annotation) interface.
The builtin annotations allow configuring the different storage drivers (like SQL) and control the code generation output.
## Custom Table Name
A custom table name can be provided for types using the `entsql` annotation as follows:
```go
package schema
import (
"github.com/facebook/ent"
"github.com/facebook/ent/dialect/entsql"
"github.com/facebook/ent/schema"
"github.com/facebook/ent/schema/field"
)
// User holds the schema definition for the User entity.
type User struct {
ent.Schema
}
// Annotations of the User.
func (User) Annotations() []schema.Annotation {
return []schema.Annotation{
entsql.Annotation{Table: "Users"},
}
}
// Fields of the User.
func (User) Fields() []ent.Field {
return []ent.Field{
field.Int("age"),
field.String("name"),
}
}
```
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