=item B<TRACE>
-The tracing functionality.
+Traces the OpenSSL trace API itself.
+
+=item B<INIT>
+
+Traces OpenSSL library initialization and cleanup.
=item B<TLS>
-General SSL/TLS.
+Traces the TLS/SSL protocol.
=item B<TLS_CIPHER>
-SSL/TLS cipher.
+Traces the ciphers used by the TLS/SSL protocol.
=item B<CONF>
=item B<PKCS5V2>
-PKCS#5 v2 keygen.
+Traces PKCS#5 v2 key generation.
=item B<PKCS12_KEYGEN>
-PKCS#12 key generation.
+Traces PKCS#12 key generation.
=item B<PKCS12_DECRYPT>
-PKCS#12 decryption.
+Traces PKCS#12 decryption.
=item B<X509V3_POLICY>
-Generates the complete policy tree at various point during X.509 v3
+Generates the complete policy tree at various points during X.509 v3
policy evaluation.
=item B<BN_CTX>
-BIGNUM context.
+Traces BIGNUM context operations.
+
+=item B<CMP>
+
+Traces CMP client and server activity.
+
+=item B<STORE>
+
+Traces STORE operations.
+
+=item B<DECODER>
+
+Traces decoder operations.
+
+=item B<ENCODER>
+
+Traces encoder operations.
+
+=item B<REF_COUNT>
+
+Traces decrementing certain ASN.1 structure references.
=item B<HTTP>
-HTTP client diagnostics
+Traces the HTTP client, such as message headers being sent and received.
=back