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:

• semantics.frontend.core.String for text values
• semantics.frontend.core.Number for decimal numeric values (with specific precision and scale defined via Number.size)
• semantics.frontend.core.Integer for whole numbers (alias for Number(38, 0))
• semantics.frontend.core.Boolean for true/false values
• semantics.frontend.core.Date for calendar dates
• semantics.frontend.core.DateTime for timestamps

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

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

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

Attributes exposed by this module.

AnyA concept type that matches any value.

AnyEntityA concept type that matches any entity.

NumericA concept type for numeric values.

NumberA concept type for decimal numbers.

ScaledNumberA numeric concept type whose precision and scale are inferred from operands.

BooleanA concept type for boolean values.

StringA concept type for string values.

DateA concept type for date values.

DateTimeA concept type for date-time values.

FloatA concept type for floating-point numeric values.

HashA concept type for opaque hash identifiers.

DefaultNumberThe default decimal number type, Number(38, 14).

IntegerThe integer number type, Number(38, 0).

Int64The 64-bit integer number type, Number(19, 0).

IntAlias for semantics.frontend.core.Integer.

Int128Alias for semantics.frontend.core.Integer.

DecimalAlias for semantics.frontend.core.DefaultNumber.

BoolAlias for semantics.frontend.core.Boolean.

ErrorA core Concept for emitting errors.

Classes

Classes exposed by this module.

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