XBRL官网不保证24X7可用，这就是为什么开发XBRL应用要建立Schema文件的本地缓存

Just to clarify - the availability of the xbrl.org webserver is NOT guaranteed 24/7 anyway.

In general it is the best strategy to
cache your own copy of needed artefacts from the website locally.
This is stated explicitly in many specifications - I will check to see if it is also included in the text relating to registries and, if it is not, I will take necessary action to update those texts.

For example, at http://www.xbrl.org/Specification/XBRL-RECOMMENDATION-2003-12-31+Corrected-Errata-2008-07-02.htm#_a it says

A. Schemas

The following are the versions of the XML schemas provided as part of this specification. These are all normative. Non-normative versions (which should be identical to these except for appropriate comments indicating their non-normative status) are also provided
as separate files for convenience of users of the specification.

NOTE: (non-normative) Following the schema maintenance policy of XBRL International, it is the intent (but is not guaranteed) that the location of non-normative versions of these schemas on the web will be as follows:

1) While any schema is the most current RECOMMENDED version and until it is superseded by any additional errata corrections a non-normative version will reside on the web in the directory http://www.xbrl.org/2003/
2) A non-normative version of each schema as corrected by this update to the RECOMMENDATION will be archived in perpetuity on the web in the directory http://www.xbrl.org/2003/2006-12-18/
Thanks

Hugh

Hugh Wallis

Director of Technical Standards

XBRL International Inc.

hughwallis@...

Tel: +1 416 238 2553

Twitter: #intxbrl