Which of the following is the attribute that is used to set a global identifier for a microdata item?*1 pointa) keyb) idc) itemclassd) itemid

Break Down the Problem

1. We need to identify the attribute that sets a global identifier for a microdata item from the options provided: a) key, b) id, c) itemclass, d) itemid.

Relevant Concepts

2. Microdata in HTML is used to annotate web content with additional machine-readable information. The attribute used to uniquely identify microdata items is critical for referencing.

Analysis and Detail

3. • a) key: This does not relate to microdata identifiers.
   • b) id: This is a common identifier in HTML, but not specific to microdata.
   • c) itemclass: This attribute does not exist in the context of microdata.
   • d) itemid: This is the attribute used in microdata to set a global identifier for the item.

Verify and Summarize

4. After analyzing the attributes, it's clear that the correct option, which sets a global identifier for a microdata item, is d) itemid.

Final Answer

The correct answer is d) itemid.