Contains a narrative description of the attribute. This is not a formal dictionary definition, but more an explanation of what the attribute means, what type of information it provides, or how it can be used.

Discusses expected uses for the attribute, such as when or why it might be used or how to determine its value. Also provides additional information about the attribute, such as similar or contrasting attributes, processing information, or material about the base element.

Best Practice notes are identified with a heading such as “Best Practice” or “Common Practice” and have a colored background for emphasis.

Authoring Notes are usage instructions aimed at persons writing or editing conference papers according to this Tag Set. These notes may identify distinctions between the authoring model available to authors and the production model used during the editorial process, or they may provide information about an element’s display in output, including any generated text resulting from the use of an attribute or a specific attribute value.

More complex “Usage/Remarks” sections may contain folded (collapsed) subsections. Instructions on navigating in this document, including opening and closing collapsed sections, appear in Navigation.

These two sections list the elements that take this attribute as optional and those that require this attribute. These sections perform three functions:

1. Naming the elements which can take the attribute, and
2. Describing the exact values and defaults for the attribute when used on specific elements.

If the attribute can be used in more than one way, or with several slightly different meanings on different elements, there will be more than one “OPTIONAL on” or “REQUIRED on” section.

Value and Meaning — Inside each “OPTIONAL on” or “REQUIRED on” section is an Attribute Value Table that lists the possible values of the attribute in that element context and explains selected values.

This table typically contains two columns. Each row in the table describes one value, where:

• The entry in the “Value” column names or describes the attribute value,
• The entry in the “Meaning”column titled “Meaning” explains the meaning of the attribute value or describes potential content for the value, and
• On rare occasions, a third column may be present. Where present, the entry in the “Behavior” column describes what an XML application might do with the attribute value.

Restriction — The last row of the table contains either with the word “Restriction” or the words “Default value”. “Restriction” indicates whether the attribute must be supplied when the relevant element is used or is optional and may be given on the element. “Default value” indicates the value of the attribute that will be used (by systems that read the schema) when the document does not supply a value.

Provides an excerpt of a tagged XML document, showing use of the current attribute. An attribute is shown in the context of one of its elements, with the current attribute highlighted in bold.