Interoperability — the problem of the xsi: type attribute.

互操作性——xsi： type属性的问题。

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Fallback To declared type - use declared type if xsi: type is unknown.

回退到声明类型——如果xsi： type未知则使用声明类型。

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In XML Schema 1.0, xsi: type was introduced as a mechanism for type substitution.

在XML Schema 1.0中，xsi： type被作为一种类型替换机制引入。

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It's a pretty sketchy rumor, but we're hearing that Canon's working on a pro video camera based on a 12.1 megapixel APS-C CMOS sensor similar to the one in the Rebel XSi.

ENGADGET: Canon working on DSLR-based pro video camera?