# `GSFormatVersionValidate`

*Function*

Whether a value identifies a supported source format.

## Declaration

```swift
func GSFormatVersionValidate(_ value: GSFormatVersion) -> Bool
```

```objc
BOOL GSFormatVersionValidate(GSFormatVersion value);
```

```python
GSFormatVersionValidate(value: GSFormatVersion) -> bool
```

## See Also

### Validation

- [`GSFormatVersionValidateOrDefault`](/Core/GlyphsCore/GSFormatVersionValidateOrDefault) — A supported source format, or [`GSFormatVersion.GSFormatVersionCurrent`](/Core/GlyphsCore/GSFormatVersion/GSFormatVersionCurrent) when the value is not supported.