English to Spanish Law/Patents Construction / Civil Engineering Construction Management Agreement

I am translation a Construction Management Agreement which contains the following definition:

“Instruments of Service” means all representations, in any medium of expression now known or later developed, of the tangible and intangible creative work performed by the Architect and the Architect’s consultants under their respective professional services agreements.

I am struggling translating “Instruments of Service”. Below my first attempt:

“Medios de los Servicios/Instrumentos/Documentos de Servicio” significa todas las representaciones, en cualquier medio de expresión ahora conocido o desarrollado con posterioridad, de las obras creativas tangibles e intangibles llevadas a cabo por el Arquitecto y los consultores del Arquitecto bajo sus respectivos contratos de servicios profesionales.

Thanks!