Unless otherwise specified, failure to observe a prescription of this specification indicated by one of the keywords must, required, must not, shall and shall not is an error.
除非另有规定，如果不能遵守 “一定、必需、绝不是，应该，不应该” 这些关键词标明的规范的规定，那么算作一个错误。
Security is not directly addressed in the Atom API specification, but one would expect an implementation to support HTTP-based authentication for the various Atom API operations.
Atom API规范中没有直接处理安全问题，但预计会出现用于各种Atom API操作的支持基于HTTP验证的实现。
ME: The choice of a standards body to use for any specification is not a straightforward one.
ME：为任何规范选择管理它的标准团体都不是一件简单的事情。
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