3GPP
Core architecture, network-function roles, network slice selection, QoS and service-based interfaces are grounded primarily in the 3GPP 5G System architecture and associated service specifications. The explanatory pages use function-level summaries rather than reproducing normative procedures.
GSMA
Commercial deployment context and operator implementation guidance are checked against GSMA network slicing and 5G Standalone material.
ETSI publications
Publicly available ETSI versions of 3GPP specifications provide the detailed architecture reference for readers who need normative definitions and procedures.
Device and access-technology material
RedCap and Ambient IoT explanations are treated as evolving ecosystem material and are checked against current 3GPP technology summaries. Product and operator support is intentionally not inferred from standards capability.