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core

relationalai.semantics.frontend

Core concept types used when declaring properties and relationships.

These concept types are used as field types when you define a Property or Relationship in a semantic model.

Common core types include:

Most end users should import core types from relationalai.semantics:

>>> from relationalai.semantics import String, Integer, Number

Examples

Section titled “Examples”

Use core types in a property definition:

>>> from relationalai.semantics import Integer, Model, String
>>> m = Model()
>>> Person = m.Concept("Person", identify_by={"id": Integer})
>>> Person.name = m.Property(f"{Person} has {String:name}")

Use a concrete decimal type in a property:

>>> Product = m.Concept("Product")
>>> Product.price = m.Property(f"{Product} costs ${Number.size(12, 2):price}")

Attributes

Section titled “Attributes”

Attributes exposed by this module.

Any A concept type that matches any value.
AnyEntity A concept type that matches any entity.
Numeric A concept type for numeric values.
Number A concept type for decimal numbers.
ScaledNumber A numeric concept type whose precision and scale are inferred from operands.
Boolean A concept type for boolean values.
String A concept type for string values.
Date A concept type for date values.
DateTime A concept type for date-time values.
Float A concept type for floating-point numeric values.
Hash A concept type for opaque hash identifiers.
DefaultNumber The default decimal number type, Number(38, 14).
Integer The integer number type, `Number(38, 0)`.
Int64 The 64-bit integer number type, `Number(19, 0)`.
Int Alias for semantics.frontend.core.Integer.
Int128 Alias for semantics.frontend.core.Integer.
Decimal Alias for semantics.frontend.core.DefaultNumber.
Bool Alias for semantics.frontend.core.Boolean.
Error A core Concept for emitting errors.

Classes

Section titled “Classes”

Classes exposed by this module.

AnyNumber Represent the family of decimal Number(precision, scale) types.