是可选元素。
Several other optional elements of items can be used.
项还有其他一些可选的元素。
Weak wildcards - permits wildcards adjacent to optional elements.
弱通配符(Weak Wildcard)——允许通配符紧接在可选元素之后。
Use XML Schema to model the required and optional elements of your transaction.
用XMLSchema为您的事务中必需的和可选的元素建模。
RSS 2.0 has many optional elements, including those that are needed for most channels.
RSS 2.0有许多可选元素，包括多数频道都需要的那些元素。
Consequently, the canonical schema format allows these and optional elements to be specified.
因此，规范schema格式允许指定这些以及可选的元素。
Even when XML includes optional elements, it's still possible to avoid the need for null values.
即使XML包含了可选因素，仍然可以避免使用null值。
An array of the optional elements reserved to accommodate elements that may be needed by extensions.
可选元素数组保留用于放置扩展可能需要的元素。
For example, are there any optional elements or attributes that were omitted from the sample document?
例如，样本文档中遗漏了什么可选元素或属性没有？
If the package is serialized to XML, it will contain the optional elements that were recorded on load, as shown in Figure 5.
如果这个包被序列化为xml，它将包含在加载时记录的可选的元素，如图5所示。
Software repositories are optional elements and aren't shown in Figure 1; they provide a means for deploying the Web 2.0 tools.
软件存储库是一些可选的元素，图1中并没有显示它们；它们提供了一种部署Web 2.0 工具的方式。
The schema provides information on all the possible tags, attribute values, and the structure of the XML document, including optional elements and attributes.
这个模式提供了关于所有可能的标签、属性值和XML文档结构(可能的元素和属性)的信息。
According to Hasan's generic structure potential theory, a generic structure is constituted of the obligatory elements, the optional elements, their recursive elements and their sequence.
根据哈桑的语类结构潜势理论，语类结构由必选成分和可选成分及其重复成分和顺序组成。
According to Hasan's generic structure potential theory, a generic structure is constituted of the obligatory elements, the optional elements, their recursive elements and their sequence.
根据哈桑的语类结构潜势理论，语类结构由必选成分和可选成分及其重复成分和顺序组成。
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