更新XMLschema(向上兼容性)。
毫无疑问，新的标准是向上兼容的。
It almost goes without saying that the new Standard is upwardly compatible with the old.
XMLschema被更新，但与现有XML schema向上兼容。
The XML schema is evolved, which is upward compatible with the existing XML schema.
实际上对于供应商而言，最好的方法是使用支持“向上兼容修复程序”的模型。
Really, the best approach for vendors is to go with the model of supporting "upwardly compatible fixes."
可以定义一个新的XMLschema，与现有XML schema向上兼容。
You can define a new XML schema that is upward compatible with the existing XML schema.
我终于明白了“向上兼容”的含义，它意味着我们需要保留所有以前的错误。
"I've finally learned what 'upward compatible' means. t means we get to keep all our old mistakes." (Dennie van Tassel).
这个场景更新XMLschema，新的schema与现有XML schema向上兼容。
This scenario evolves the XML schema that is upward compatible with the existing XML schema.
如果需要将两种不同来源、分别具有不同专门化的文档组合起来，那么这种向上兼容性非常有用。
This upward compatibility is useful when you want to combine sets of documentation from two sources, each of which has specialized differently.
我已经提到过具有向上兼容性的XMLschema更新的问题，即不能检查新添加的元素和属性是否存在。
I've already mentioned the problem about evolving an XML schema with upward compatibility, where the existence of newly added elements and attributes cannot be checked.
使用向上兼容性更新XMLschema时需要考虑的一个问题是：XML数据具有新添加的元素和属性时不能通过验证。
A concern with evolving XML schema with upward compatibility is that XML data cannot be validated with the existence of newly added elements and attributes.
工具间的关系主要讨论工具家族中的成员关系准则、构造良好的工具配置、工具的向上兼容关系、以及工具修订的影响范围。
It also discusses the membership rules of the tool families, good construct of the tool configuration, upward compatible relations between the tool, and the scope affected by the tools' updating.
OWLFull完全向上兼容RDF，从句法上和语义上都兼容：任何合法的 RDF文档也都是合法的 OWL Full 文档。
OWL Full is fully upward-compatible with RDF, both syntactically and semantically: any legal RDF document is also a legal OWL Full document.
如果XMLschema被更新为与现有XML schema具有向上兼容性，则现有XML数据无需任何更改就可以通过新的XML schema进行管理。
If the XML schema is evolved as upward compatible with the existing XML schema, the existing XML data can be managed with the new XML schema without any modifications.
当XML数据更新为与现有 XML schema具有向上兼容性时，可以使用新的 XML schema来管理现有 XML 数据，无需任何修改。
When XML data is evolved which is upward compatible with the existing XML schema, you can manage the existing XML data with the new XML schema without any modification.
XMLschema cust2 . xsd与XML schemacust1 . xsd向上兼容，因此cust1 . xsd可以被cust2 . xsd替换。
Is upward compatible with the XML schema cust1.xsd so that cust1.xsd can be replaced with cust2.xsd.
US-ASCII对UTF-8 向上兼容（US-ASCII字符串也是 UTF-8 字符串，参见 [RFC 3629]），因此如果需要与 US-ASCII 保持兼容，UTF-8 非常合适。
US-ASCII is upwards-compatible with UTF-8 (an US-ASCII string is also a UTF-8 string, see [RFC 3629]), and UTF-8 is therefore appropriate if compatibility with US-ASCII is desired.
US-ASCII对UTF-8 向上兼容（US-ASCII字符串也是 UTF-8 字符串，参见 [RFC 3629]），因此如果需要与 US-ASCII 保持兼容，UTF-8 非常合适。
US-ASCII is upwards-compatible with UTF-8 (an US-ASCII string is also a UTF-8 string, see [RFC 3629]), and UTF-8 is therefore appropriate if compatibility with US-ASCII is desired.
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