Common elements that can be specialized in DITA vary based on the industry, domain, or content requirements. However, some elements are often specialized across different contexts:

Task Elements: Elements related to task-based content, such as <step>, <task>, and <cmd>, are frequently specialized to accommodate industry-specific tasks and procedures.

Concept Elements: Elements like <term> and <definition> may be specialized to align with specific domains, such as legal, medical, or technical documentation, to capture industry-specific terminology and concepts.

Reference Elements: Elements used for references, such as <cite> and <related-links>, can be specialized to include additional metadata or attributes that are relevant to a particular content domain.

Media Elements: Elements for multimedia content, such as <video> and <audio>, are commonly specialized to ensure they support various media formats and player controls specific to the industry or audience.

Example:

In the automotive industry, the <step> element used for documenting repair procedures may be specialized to include attributes related to automotive part numbers and safety guidelines, ensuring that repair instructions are tailored to the automotive domain.