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Specifies the type of external resource that is being requested or processed.
This enum is primarily used to distinguish different certificate validation and trust-chain auxiliary data sources when resolving external network resources such as CRLs, OCSP responses, or timestamping services.
CRL: 0;
Certificate Revocation List (CRL) resource.
OCSP: 1;
Online Certificate Status Protocol (OCSP) resource.
TSA: 2;
Time Stamping Authority (TSA) resource.