作者只需要学习针对该主题类型的元素。
The author only needs to learn the elements that are specific to the topic type.
主题：主题类型限制了主题内容的结构。
Topic: the topic type mandates the structure for the content of a topic.
为包括基本主题在内的主题类型定义元素。
Define the elements for the topic type, including the base topics.
对专门化主题类型应用常规样式表或转换。
Applying a general style sheet or transform to a specialized topic type.
有特定信息需要的公司可以定义专门的主题类型。
A company that has specific information needs can define specialized topic types.
主题类型的设计值只需要处理特定的、可控的问题域。
The designer of the topic type only needs to address a specific, manageable problem domain.
特殊的主题类型可作为更一般的主题类型进行常规处理。
Special topic types can be treated as more generic topic types for common processing.
下面列出了映射中的主题，显示了嵌套的主题类型及标题。
Here's the list of topics from the map, showing the nested topic type and title.
泛化专门化类型的主题(将其转化成更一般的主题类型)。
Generalizing a topic of a specialized type (transforming it into a more generic topic type).
域标识实体列出主题类型以及域和同当前域有相关性的其它域。
The domain identification entity lists the topic type as well as the domain and other domains for which the current domain has dependencies.
DITA通过这些模块提供了创建主题类型和域的新组合的构件。
Through these modules, DITA provides you with the building blocks to create new combinations of topic types and domains.
在大多数情况下，这些主题结构包含的内容元素并不特定于主题类型。
In most cases, these topic structures contain content elements that are not specific to the topic type.
基于主题写作的DITA方法将重点放在以下三个基本的主题类型上。
The DITA approach to topic-based writing focuses on three fundamental types of topic.
DITA包括三种从基本主题类型派生的信息类型：任务、概念和参考。
DITA includes three information types derived from the base topic type: task, concept, and reference.
限制集合的内容，要求在集合中的特定位置出现特定的主题类型或者角色。
To restrict the contents of the collection, requiring specific topic types or roles at specified positions within the collection.
这种专门化的主题类型为作者提供了指导信息，可以保证所有任务主题的一致。
This specialized topic type provides guidance to the author and ensures the consistency of all task topics.
基本的专门化主题类型是concept、reference和task。
The basic specialized topic types are concept, reference, and task.
通过主题粒度和主题类型专门化，DITA为信息集带来了面向对象模型的以下优点。
Through topic granularity and topic type specialization, DITA brings the following benefits of the object-oriented model to information sets.
主题专门化就是作者和架构师定义主题类型同时保持与已有样式表、转换、过程兼容的过程。
Topic specialization is the process by which authors and architects can define topic types, while maintaining compatibility with existing style sheets, transforms, and processes.
专门化还为多层或分级规范提供了支持，允许更一般的主题类型作为不同特殊类型的公共基础。
Specialization also provides support for multi-level or hierarchical specializations, which allow more general topic types to serve as the common denominator for different specialized types.
通过为每种内容类型创建专门化的主题类型，产品架构师可以保证每种主题类型都有适当的内容。
By creating a specialized topic type for each type of content, the product architect can ensure that each type of topic has the appropriate content.
IBMSupportPortal允许通过应用不同的主题类型来更改定制门户的上下文。
The IBM Support portal lets you change the context of your customized portal by applying different topic types.
相对于现有主题类型，以扩展或增加定义新主题类型，因此减少了定义和维护新类型所必需的工作。
The new topic types are defined as an extension, or delta, relative to an existing topic type, thereby reducing the work necessary to define and maintain the new type.
专门化是由作者和体系结构设计者定义新主题类型，同时保持与现有样式表、转换和过程兼容的过程。
Topic specialization is the process by which authors and architects define new topic types, while maintaining compatibility with existing style sheets, transforms, and processes.
class属性必须包含到专门化类型谱系中每种主题类型的映射，即使没有出现元素重命名也应如此。
The class attribute must include a mapping for every topic type in the specialized type's ancestry, even those in which no element renaming occurred.
您可以使用DITA专门化分别为这些约束、条件和不变式建模，可能还要扩展concept主题类型。
You can model these constraints, conditions, and invariants independently using DITA specialization, probably by extending the concept topic type.
不要通过专门化已经专门化的主题类型来创建领域，这样可能造成意料之外的泛化行为，该体系结构目前还不支持。
Do not create a domain by specializing an already specialized topic type: This can result in unpredictable generalization behavior, and is not currently supported by the architecture.
主题类型定义主题内部的信息体系结构（在微观层次上），而映射类型定义跨越主题的信息体系结构（宏观层次上）。
The topic type defines the information architecture within topics (the micro level) while the map type defines the information architecture across topics (the macro level).
对于内容的每一类型，通过创建专门的主题类型，产品体系结构能够确保主题的每一类型都有适当的内容。
By creating a specialized topic type for each type of content, the product architect can ensure that each type of topic has the appropriate content.
对于内容的每一类型，通过创建专门的主题类型，产品体系结构能够确保主题的每一类型都有适当的内容。
By creating a specialized topic type for each type of content, the product architect can ensure that each type of topic has the appropriate content.
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