Dewey Decimal in Schema.org

Greetings,

I'm working with the Dewey Decimal classification system and am wondering
several things:

1. Is there a way to indicate this on types (Books or otherwise)? I don't
directly see anything on https://schema.org/Book
2. When I use Google to search for "schema.org and Dewey Decimal
classification" the AI based results suggest the quoted text below.
3. I failed to find the property "libraryClassification" (mentioned in the
Google AI results) in the schema.org documentation. Is this me, the
documentation, or an AI hallucination?
4. On the page for Book example 4 in the JSON+LD view has a property
labeled "sku". The content of this field is not a sku but rather a Library
of Congress Classification Number. It seems poor form to put an LCCN in the
SKU field, but maybe someone can enlighten me on some of the
conceptualization around the usage of SKU and its range of applicability.

Kind regards,
Hugh

```
In Schema.org, the Dewey Decimal System is represented by the property
"libraryClassification" with the value "Dewey Decimal Classification" which
indicates that a book or other item is classified using the Dewey Decimal
system, allowing for easier search and organization based on its subject
matter across different libraries and platforms.
Key points about the Dewey Decimal System in Schema.org:

   - *Purpose:*
   To specify the classification system used for a library item, allowing
   search engines and other applications to understand how a book is
   categorized based on its topic.
   - *Value:*
   "Dewey Decimal Classification" is the text value used to denote that the
   Dewey Decimal System is the classification method.
   - *Usage:*
   You would typically include this property within the "Item" or "Book"
   schema type when describing a library item in structured data.

Example Schema.org code with Dewey Decimal Classification:
Code

{
  "@context": "http://schema.org/",
  "@type": "Book",
  "name": "The History of the United States",
  "author": "John Smith",
  "libraryClassification": "Dewey Decimal Classification"
}



```