We present a solution for inter-linking domain thesauri and other controlled vocabularies represented as Linked Data content within the LusTRE framework. We discuss how such inter-linked content can help users to easier and better express and use thesauri and controlled vocabularies for metadata work within Spatial Data Infrastructures, at the concrete example of an INSPIREdriven environmental use case. We present the Thesaurus Exploitation services designed and implemented for LusTRE and their integration with existing metadata editors and SDI geoportals.