The MHDS Profile specifies how a collection of IHE profiles can be used by communities for exchanging health information. These IHE profiles include support for patient identification, health document location and retrieval, provider directories, and the protection of privacy and security.
The link to the IG mHDS IG web page is incorrect in https://profiles.ihe.net/ITI/TF/Volume1/ch-50.html (link is done to mCSD instead)