As part of this release, we have included an extra custom property for attack-patterns,
x_capec_version, to indicate the CAPEC version.
See below for more detail on this content.
Thanks again for your interest and contributions to CAPEC!
The MITRE Corporation
MITRE has been working with DHS and the OASIS Cyber Threat Information (CTI) technical committee to develop STIX (Structured Threat Information eXpression) a standard for exchanging cyber threat information. STIX 2.0, which was released
in 2017, as a committee standard , is implemented as JSON objects. MITRE has set up a GitHub site  which contains various cyber threat information content, expressed using the STIX standard, available to anyone.
In order to make CAPEC content more accessible, we have recently converted the CAPEC Attack Patters to the STIX format. This an alternative way to view CAPEC content – capec.mitre.org is still the primary source. They are available
at that site in the ‘capec’ subdirectory. Not all properties of a CAPEC Attack Pattern was converted, due to limitations of the STIX format and the complexity of some CAPEC properties. For more details on the conversion mapping see USAGE-CAPEC.md.
That documentation also includes instructions on how to use the python-stix2 API  to access this content programmatically.