He writes that going off of ISBN Numbers alone won't yield an accurate number, partly because ISBN isn't used in non-Western countries.
他写道只靠“国际标准图书编号”无法得出准确计数，一部分原因在于国际标准图书编号在非西方国家中不被使用。
You derive this component from the type ISBN and restrict an ISBN to a maximum of five digits.
您从类型ISBN派生该组件并限制其IS BN最大为五位。
So @isbn would select all attributes named isbn, not the value of those attributes.
因此，@isbn将选择所有名为isbn属性而不是这些属性的值。
The book instance's isbn should be set to the value of the isbn element, nested in the book-info element.
book实例的isbn应该设置为book - info元素中嵌套的isbn元素的值。
For example, the urn urn: ISBN: 1-0-7666-98-0 is a URI that, like an ISBN book number, allows one to talk about a book, but doesn't suggest where and how to obtain an actual copy of it.
例如，urn urn： ISBN： 1 - 0 - 7666 - 98 - 0是一个URI，像IS BN图书编号一样，它允许您谈到一本书，但是并未指明在哪里能实际得到它的拷贝和如何得到。
For example, the urn urn: ISBN: 1-0-7666-98-0 is a URI that, like an ISBN book number, allows one to talk about a book, but doesn't suggest where and how to obtain an actual copy of it.
例如，urn urn： ISBN： 1 - 0 - 7666 - 98 - 0是一个URI，像IS BN图书编号一样，它允许您谈到一本书，但是并未指明在哪里能实际得到它的拷贝和如何得到。
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