NOTE: Freya (and associated component libraries) has been archived for now. The ideas in Freya are still more than worthy of investigation, but the community adopted more conventional approaches to web development, making maintenance for Freya a challenge. For those who used Freya and contributed thoughts, encouragement, and code, thank you!
The ideas in Freya may well be resurrected at a later date, possibly on other platforms...
Freya Types provides strongly typed data structures for core web standards (e.g. HTTP, URIs, Language Tags, etc.) as well as appropriate parsers and optics relating to the provided types.
For more information see the meta-repository for the Freya Web Stack, along with the main freya.io site.