Scala shows promise as a language for building Semantic Web and Linked Data applications. As an example Scala RDF API (scardf) provides a DSL for writing, traversing and querying RDF graphs.

Scala Tools

Scala Semantic Web Projects

Scala RDF References

Scala Domain Specific Languages

Scala XML References

In Scala XML is a first-class data type, providing easy parsing of RDF/XML. There are no Scala implementations of XSLT or XQuery but the Java APIs can be used.

Scala RESTful HTTP