NOTE: XMPP Session Establishment, described in outdated RFC 3921, is no longer a part of standard: RFC 6121: Functional Summary. However since this is a widely used feature, it is implemented in goxmpp.
RFC 6120: XMPP CORE In progress
XML Streams Yes
STARTTLS Negotiation Yes
SASL Negotiation In progress
Resource Binding Yes
XML Stanzas In progress
RFC 6121: XMPP IM In progress
Roster Management: In progress
RFC 3921 (superseded by RFC 6121): Rejected
Session Establishment: Yes
XEP-0012: Last Activity No
XEP-0030: Service Discovery No
xep-0049: Private XML Storage In progress
XEP-0077: In-Band Registration No
XEP-0115: Entity Capabilities In progress
XEP-0138: Stream Compression Yes
XEP-0199: XMPP Ping No
XEP-0202: Entity Time No
XEP-0203: Delayed Delivery No
XEP-0229: Stream Compression with LZW In progress