IETF RFC
Trigger: !rfc
Try it
Kagi would openhttps://tools.ietf.org/html/rfcstring+split
Run @rfc in Kagi for Kagi's own results from tools.ietf.org only
URL pattern: https://tools.ietf.org/html/rfcquery
Searches tools.ietf.org, filed under Programming.