# inDefinedTermSet - Schema.org Property

> Source: https://schema.org/inDefinedTermSet
> Extracted: 2026-02-16T18:47:05.718Z

---

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A Schema.org Property

*This term is in the "new" area - implementation feedback and adoption from applications and websites can help improve our definitions.*

#### Sub-properties

-   [inCodeSet](https://schema.org/inCodeSet "inCodeSet")

#### Source

[https://github.com/schemaorg/schemaorg/issues/894](https://github.com/schemaorg/schemaorg/issues/894)

  

### Examples

Example notes or example HTML without markup.

<div>
	<div>
	 <h1><a href="http://openjurist.org/dictionary/Ballentine">Ballentine&apos;s Law Dictionary</a></h1>
	</div>
	<div>
		<h2>Dictionary term</h2>
		Name: calendar year<br/>
		Description: The period from January 1st to December 31st, inclusive, of any year.<br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
	</div>
	<div>
		<h2>Dictionary term</h2>
		Name: schema<br/>
		Description: A representation of a plan or theory in the form of an outline or model.<br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
	</div>
</div>

Example encoded as [Microdata](https://en.wikipedia.org/wiki/Microdata_\(HTML\)) embedded in HTML.

<div>
	<div itemscope itemtype="https://schema.org/DefinedTermSet">
	<link itemprop="additionalType" href="https://schema.org/Book">
	 <h1><a itemprop="url" href="http://openjurist.org/dictionary/Ballentine"><span itemprop="name">Ballentine&apos;s Law Dictionary</span></a></h1>
	</div>
	<div itemscope itemtype="https://schema.org/DefinedTerm">
		<h2>Dictionary term</h2>
		<link itemprop="url" href="http://openjurist.org/dictionary/Ballentine/term/calendar-year"/>
		Name: <span itemprop="name">calendar year</span><br/>
		Description: <span itemprop="description">The period from January 1st to December 31st, inclusive, of any year.</span><br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
		<link itemprop="inDefinedTermSet" href="http://openjurist.org/dictionary/Ballentine">
	</div>
	<div itemscope itemtype="https://schema.org/DefinedTerm">
		<h2>Dictionary term</h2>
		<link itemprop="url" href="http://openjurist.org/dictionary/Ballentine/term/schema"/>
		Name: <span itemprop="name">schema</span><br/>
		Description: <span itemprop="description">A representation of a plan or theory in the form of an outline or model.</span><br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
		<link itemprop="inDefinedTermSet" href="http://openjurist.org/dictionary/Ballentine">
	</div>
</div>

Example encoded as [RDFa](https://en.wikipedia.org/wiki/RDFa) embedded in HTML.

<div  vocab="https://schema.org/">
	<div typeof="DefinedTermSet Book">
	 <h1><a property="url" href="http://openjurist.org/dictionary/Ballentine"><span property="name">Ballentine&apos;s Law Dictionary</span></a></h1>
	</div>
	<div typeof="DefinedTerm">
		<h2>Dictionary term</h2>
		<link property="url" href="http://openjurist.org/dictionary/Ballentine/term/calendar-year"/>
		Name: <span property="name">calendar year</span><br/>
		Description: <span property="description">The period from January 1st to December 31st, inclusive, of any year.</span><br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
		<link property="inDefinedTermSet" href="http://openjurist.org/dictionary/Ballentine">
	</div>
	<div typeof="DefinedTerm">
		<h2>Dictionary term</h2>
		<link propery="url" href="http://openjurist.org/dictionary/Ballentine/term/schema"/>
		Name: <span property="name">schema</span><br/>
		Description: <span property="description">A representation of a plan or theory in the form of an outline or model.</span><br/>
		In Dictionary: Ballentine&apos;s Law Dictionary
		<link property="inDefinedTermSet" href="http://openjurist.org/dictionary/Ballentine">
	</div>
</div>

Example encoded as [JSON-LD](https://en.wikipedia.org/wiki/JSON-LD) in a HTML script tag.

\[
	{
		"@context": "https://schema.org/"
	},
	{
		"@type": \["DefinedTermSet","Book"\],
		"@id": "http://openjurist.org/dictionary/Ballentine",
		"name": "Ballentine's Law Dictionary"
	},
	{
		"@type": "DefinedTerm",
		"@id": "http://openjurist.org/dictionary/Ballentine/term/calendar-year",
		"name": "calendar year",
		"description": "The period from January 1st to December 31st, inclusive, of any year.",
		"inDefinedTermSet": "http://openjurist.org/dictionary/Ballentine"
	},
	{
		"@type": "DefinedTerm",
		"@id": "http://openjurist.org/dictionary/Ballentine/term/schema",
		"name": "schema",
		"description": "A representation of a plan or theory in the form of an outline or model.",
		"inDefinedTermSet": "http://openjurist.org/dictionary/Ballentine"
	}
\]

Structured representation of the JSON-LD example.

Example notes or example HTML without markup.

<div>
	<h1>Occupation Term defined by <a href="http://onetonline.org">O\*Net Online</a></h1>
	<h2>51-6042.00 - Shoe Machine Operators and Tenders</h2>
	Operate or tend a variety of machines to join, decorate, reinforce, or finish shoes and shoe parts.
</div>

Example encoded as [Microdata](https://en.wikipedia.org/wiki/Microdata_\(HTML\)) embedded in HTML.

<div itemscope itemtype="https://schema.org/DefinedTerm">
	<h1>Occupation Term defined by <a itemprop="inDefinedTermSet" href="http://onetonline.org">O\*Net Online</a></h1>
	<h2><span itemprop="termCode">51-6042.00</span> - <span itemprop="name">Shoe Machine Operators and Tenders</span></h2>
	<span itemprop="description">Operate or tend a variety of machines to join, decorate, reinforce, or finish shoes and shoe parts.</span>
</div>

Example encoded as [RDFa](https://en.wikipedia.org/wiki/RDFa) embedded in HTML.

<div vocab="https://schema.org/" typeof="DefinedTerm">
	<h1>Occupation Term defined by <a property="inDefinedTermSet" href="http://onetonline.org">O\*Net Online</a></h1>
	<h2><span property="termCode">51-6042.00</span> - <span property="name">Shoe Machine Operators and Tenders</span></h2>
	<span property="description">Operate or tend a variety of machines to join, decorate, reinforce, or finish shoes and shoe parts.</span>
</div>

Example encoded as [JSON-LD](https://en.wikipedia.org/wiki/JSON-LD) in a HTML script tag.

{
 "@context": "https://schema.org/",
 "@type": "DefinedTerm",
 "name": "Shoe Machine Operators and Tenders",
 "termCode": "51-6042.00",
 "description": "Operate or tend a variety of machines to join, decorate, reinforce, or finish shoes and shoe parts.",
 "inDefinedTermSet": "http://onetonline.org"
}

Structured representation of the JSON-LD example.