The fifth generation (5G) of mobile networks emerged to cover the demand for an increasingly wide range of industrial use cases and contemporary daily aspects, in general. Network slicing is projected as a key enabler for serving this multitude of tenants. Network slicing, as an ongoing standardization work, encapsulates the different vision and terminology across Standards Development Organizations (SDOs). That note is depicted in several existing approaches, but the extensive introduction of customizations severely undermines interoperability. On the other hand, this work leverages Openslice, a Service based, opensource Operation Support System (OSS), and aims to augment its functionality by proposing a fully standardized network slicing mechanism, combining contributions from major SDOs.