Google 的联系人 API 和 CardDav API 有什么区别？
What is the difference between Google's Contacts API and CardDav API?
我知道它们的实现方式不同，但在功能方面有什么区别？
Google CardDAV API 允许您使用 CardDAV protocol 访问 Google 个联系人 API。
vCard Extensions to WebDAV (CardDAV) is an address book client/server
protocol designed to allow users to access and share contact data on a
server.
Google 联系人 API 本身就是一个 Google 数据 API 协议。
GData (Google Data Protocol) provides a simple protocol for reading
and writing data on the Internet, designed by Google. GData combines
common XML-based syndication formats (Atom and RSS) with a
feed-publishing system based on the Atom Publishing Protocol, plus
some extensions for handling queries. It relies on XML or JSON as a
data format.
什么是协议：
protocol In information technology, a protocol is the special set
of rules that end points in a telecommunication connection use when
they communicate. Protocols specify interactions between the
communicating entities.
Google的联系人API和CardDavAPI有什么区别？
区别在于用于访问数据的协议。
我知道它们的实现方式不同，但在功能方面有什么区别？
Google CardDAV API 允许您使用 CardDAV protocol 访问 Google 个联系人 API。
vCard Extensions to WebDAV (CardDAV) is an address book client/server protocol designed to allow users to access and share contact data on a server.
Google 联系人 API 本身就是一个 Google 数据 API 协议。
GData (Google Data Protocol) provides a simple protocol for reading and writing data on the Internet, designed by Google. GData combines common XML-based syndication formats (Atom and RSS) with a feed-publishing system based on the Atom Publishing Protocol, plus some extensions for handling queries. It relies on XML or JSON as a data format.
什么是协议：
protocol In information technology, a protocol is the special set of rules that end points in a telecommunication connection use when they communicate. Protocols specify interactions between the communicating entities.
Google的联系人API和CardDavAPI有什么区别？
区别在于用于访问数据的协议。