In DITA XML, there are several types of links and references that facilitate structured content authoring and improve content organization. These include:

1. <conref> Links: Conref, short for “conditional referent,” allows content to be reused or referenced within a DITA document. It enables you to include entire topics, sections, or even small elements from one topic into another. Conref links are valuable for maintaining consistency and reducing redundancy in content.

Example:

Here’s an example of a <conref> link in DITA XML:

<topicref href="common-topic.dita" conref="topic-specific.dita#/root/para[2]" />

2. <topicref> Links: Topic references, defined with the <topicref> element, are used to reference or link to other DITA topics. They allow you to include related topics or create a hierarchy of content for navigation and organization.

Example:

Here’s an example of a <topicref> link in DITA XML:

<topicref href="related-topic.dita" />

3. <link> Elements: DITA XML also supports the <link> element for creating explicit hyperlinks within your content. These links are similar to standard HTML links and can point to external resources, websites, or internal topics.

Example:

Here’s an example of a <link> element in DITA XML:

<link href="https://example.com" />