Explanation

Code 48 is used to indicate that a publication contains math content such as formulas and equations.

Code 48 is typically set in a <ProductContentType> element for digital publications. Math equations and formulas are typically only part of the text content.

Only for use in ONIX 3.0 or later.

Schema.org mapping

Depending on how the math is encoded, code 48 is the equivalent of setting the mathOnVisual access mode (for images of math) or the textual access mode (for MathML markup, latex, etc.) using schema.org metadata.

Examples

Example 1 — Math textbook 
…
<PrimaryContentType>10</PrimaryContentType>
<ProductContentType>48</ProductContentType>
…

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