3.1.5.1.4 BPROPFIND
The Depth header, as specified in section 2.2.2.8, MUST be present in BPROPFIND method requests and have a value of 0.
The request body for the BPROPFIND method is the same as the PROPFIND method, as specified in section 3.1.5.1.10, with the addition of the targetXML element, as specified in section 2.2.3.1, at the same level as the prop XML element, specified in [RFC2518] section 12.11.
The BPROPFIND method is not supported in transactions.