# `RDF.XSD.Facet`
[🔗](https://github.com/rdf-elixir/rdf-ex/blob/v3.0.1/lib/rdf/xsd/facet.ex#L1)

A behaviour for XSD restriction facets.

Here's a list of all the `RDF.XSD.Facet`s RDF.ex implements out-of-the-box:

| XSD facet        | `RDF.XSD.Facet`                   |
| :--------------  | :-------------                    |
| length           | `RDF.XSD.Facets.Length`           |
| minLength        | `RDF.XSD.Facets.MinLength`        |
| maxLength        | `RDF.XSD.Facets.MaxLength`        |
| maxInclusive     | `RDF.XSD.Facets.MaxInclusive`     |
| maxExclusive     | `RDF.XSD.Facets.MaxExclusive`     |
| minInclusive     | `RDF.XSD.Facets.MinInclusive`     |
| minExclusive     | `RDF.XSD.Facets.MinExclusive`     |
| totalDigits      | `RDF.XSD.Facets.TotalDigits`      |
| fractionDigits   | `RDF.XSD.Facets.FractionDigits`   |
| explicitTimezone | `RDF.XSD.Facets.ExplicitTimezone` |
| pattern          | `RDF.XSD.Facets.Pattern`          |
| whiteSpace       | ❌                                |
| enumeration      | ❌                                |
| assertions       | ❌                                |

Every `RDF.XSD.Datatype.Primitive` defines a set of applicable constraining facets which are can
be used on derivations of this primitive or any of its existing derivations:

| Primitive datatype | Applicable facets |
| :----------------- | :---------------- |
|string | `RDF.XSD.Facets.Length`, `RDF.XSD.Facets.MaxLength`, `RDF.XSD.Facets.MinLength`, `RDF.XSD.Facets.Pattern` |
|boolean | `RDF.XSD.Facets.Pattern` |
|float | `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|double | `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|decimal | `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern`, `RDF.XSD.Facets.TotalDigits`, `RDF.XSD.Facets.FractionDigits` |
|decimal | `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern`, `RDF.XSD.Facets.TotalDigits` |
|duration | `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|dateTime | `RDF.XSD.Facets.ExplicitTimezone`, `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|time | `RDF.XSD.Facets.ExplicitTimezone`, `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|date | `RDF.XSD.Facets.ExplicitTimezone`, `RDF.XSD.Facets.MaxExclusive`, `RDF.XSD.Facets.MaxInclusive`, `RDF.XSD.Facets.MinExclusive`, `RDF.XSD.Facets.MinInclusive`, `RDF.XSD.Facets.Pattern` |
|anyURI | `RDF.XSD.Facets.Length`, `RDF.XSD.Facets.MaxLength`, `RDF.XSD.Facets.MinLength`, `RDF.XSD.Facets.Pattern` |

<https://www.w3.org/TR/xmlschema11-2/datatypes.html#rf-facets>

# `t`

```elixir
@type t() :: module()
```

# `name`

```elixir
@callback name() :: String.t()
```

The name of a `RDF.XSD.Facet`.

# `def_facet_constraint`
*macro* 

Macro for the definition of concrete constraining `value` for a `RDF.XSD.Facet` on a `RDF.XSD.Datatype`.

---

*Consult [api-reference.md](api-reference.md) for complete listing*