For more information you can check this pages:
European general framework:
http://www.europarl.europa.eu/atyourservice/en/displayFtu.html?ftuId=FTU_3.2.3.html
Providing services abroad:
http://europa.eu/youreurope/business/sell-abroad/service-providers/index_en.htmv
Establish and provide services:
http://www.europarl.europa.eu/atyourservice/en/displayFtu.html?ftuId=FTU_3.1.4.html
Single market for services:
http://www.europarl.europa.eu/atyourservice/en/displayFtu.html?ftuId=FTU_3.1.4.html
Service Directive:
https://ec.europa.eu/growth/single-market/services_es
Professional qualifications directive:
https://ec.europa.eu/growth/single-market/services/free-movement-professionals_en
Service package:
http://ec.europa.eu/growth/content/services-economy-works-europeans-1_en
Collavorative economy:
https://ec.europa.eu/growth/single-market/services/collaborative-economy_en
Retail:
https://ec.europa.eu/growth/single-market/services/retail_en
Internal market information system:
http://ec.europa.eu/internal_market/imi-net/index_en.htm
Standardisation:
https://ec.europa.eu/growth/single-market/services/service-standards_en