Currently Evolution Address Books are supported as sources, but only if they are local. It would be nice if we could use CardDav/WebDav address books as a source within Libreoffice. I don't know if this could be handled as an extension of the Evolution plugin, or if it would need to be handled as a separate module altogether. It would also be nice to use CardDav as a source for mail-merge.
I would like to have carddav as an addressbook source in LibreOffice too.
Using Evolution is not a good way, e.g. because Evolution is only available for Linux. And you would need to install Evolution, even when you are using another programm for E-mail.
A native driver would be the best, maybe using a library like pyCardDAV.
Another way would be using ODBC or something like that. But so far I know there is no carddav driver for ODBC.
Since this seems to have been ignored by devs, I'd like to stress again how important it is to have CardDAV support in LibreOffice being the only cross-platform protocol/format for addresses.
I just want to second this. CardDAV is *the* open standard for contacts exchange. Libreoffice should definitely support it as an address book source.