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Really general overview:\newline
http://en.wikipedia.org/wiki/CalDAV\footnote{http://en.wikipedia.org/wiki/CalDAV}

This is a good overview of the specifications:\newline
http://caldav.calconnect.org/standards.html\footnote{http://caldav.calconnect.org/standards.html}

Here are some of the standards we'll be implementing.  Note that several of these documents are referenced in our target spec:\newline
http://www.ietf.org/rfc/rfc3253.txt\footnote{http://www.ietf.org/rfc/rfc3253.txt}\newline
http://www.ietf.org/rfc/rfc3744.txt\footnote{http://www.ietf.org/rfc/rfc3744.txt}\newline
http://www.ietf.org/rfc/rfc4791.txt\footnote{http://www.ietf.org/rfc/rfc4791.txt}\newline
http://www.ietf.org/rfc/rfc4918.txt\footnote{http://www.ietf.org/rfc/rfc4918.txt}\newline
http://tools.ietf.org/html/draft-desruisseaux-caldav-sched-03\footnote{http://tools.ietf.org/html/draft-desruisseaux-caldav-sched-03}

Overview of the specification dependencies and documents:\newline
http://www.rooftopsolutions.nl/article/227\footnote{http://www.rooftopsolutions.nl/article/227}

Google's instructions on using Sunbird (free/open source calendar software that supports CalDAV as a client) with Google Calendar:\newline
http://www.google.com/support/calendar/bin/answer.py?answer=99355\footnote{http://www.google.com/support/calendar/bin/answer.py?answer=99355}

This is a document that outlines the coding standards that will be in effect on all software we write:\newline
http://wiki.horde.org/Horde4/CodingStandards\footnote{http://wiki.horde.org/Horde4/CodingStandards}

Code resources for CalDAV and GroupDAV:\newline
caldav:\newline
http://rscds.sourceforge.net/\footnote{http://rscds.sourceforge.net/}\newline
http://rscds.sourceforge.net/clients.php\footnote{http://rscds.sourceforge.net/clients.php}\newline
http://wiki.zimbra.com/index.php?title=CalDAV\_with\_Leopard\_iCal\footnote{http://wiki.zimbra.com/index.php?title=CalDAV\_with\_Leopard\_iCal}\newline
http://www.rooftopsolutions.nl/article/232\footnote{http://www.rooftopsolutions.nl/article/232}

groupdav:\newline
http://www.egroupware.org/index.php?page\_name=wiki\&wikipage=GroupDAV\footnote{http://www.egroupware.org/index.php?page\_name=wiki\&wikipage=GroupDAV}\newline
http://www.nabble.com/GroupDAV-and-IcalSrv-1.4.003-td15045378s3741.html\footnote{http://www.nabble.com/GroupDAV-and-IcalSrv-1.4.003-td15045378s3741.html}

DavMail\footnote{http://example.com/index.php?page=DavMail}: (CalDav\footnote{http://example.com/index.php?page=CalDav} Gateway with Exchange\footnote{http://www.internex.at/de/hosted-exchange/})\newline
http://davmail.sourceforge.net\footnote{http://davmail.sourceforge.net}

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