## ISO Standards Tag Set (ISOSTS) version 0.5: A customization of NISO JATS version 0.4

#### International Organization for Standardization (ISO)

# xmlns:xsi

# XML Schema Namespace Declaration

This is not an attribute, but a namespace pseudo-attribute. The value provides a prefix to use for the MathML @xsi:schemaLocation attribute. All namespace prefixes must be associated with a URL, and the prefix “ `xsi` ” has been set to the URL for the World Wide Web Consortium (W3C) XML Schema.

## Attribute Values

#### In Element

##### <standard>

Value | Meaning
--- | ---
http://www.w3.org/2001/XMLSchema-instance | The prefix “ `xsi` ” has been set to this URL, the URL of the W3C XML Schema.
Restriction: This attribute value may not be changed.

## ISO Standards Tag Set (ISOSTS) version 0.5: A customization of NISO JATS version 0.4

#### Version of September 2011