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codeValue

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > termCode > codeValue

A short textual code that uniquely identifies the value.
Values expected to be one of these types
Text
Used on these types
CategoryCode
MedicalCode
Super-properties
termCode

Source

https://github.com/schemaorg/schemaorg/issues/894

Examples

Example 1
Without Markup Microdata RDFa JSON-LD 
<div>
	<h1>ISO 639-2: Codes for the Representation of Names of Languages<h1>
	<h2>Listing of codes:</h2>
	<ul>
		<li>...</li>
		<li>cze</li>
		<li>...</li>
	</ul>
</div>
<div>
	<h2>Czech; tchèque; Tschechisch</h2>
	<h3>From: ISO 639-2: Codes for the Representation of Names of Languages</h3>
	English: Czech<br/>
	French: tchèque<br/>
	German: Tschechisch<br/>
</div>

<div itemscope itemtype="http://schema.org/CategoryCodeSet" itemid="http://id.loc.gov/vocabulary/iso639-2">
	<h1 itemprop="name">ISO 639-2: Codes for the Representation of Names of Languages</h1>
	<h2>Listing of codes:</h2>
	<ul>
		<li>...</li>
		<li><span itemprop="hasCategoryCode" itemid="http://id.loc.gov/vocabulary/iso639-2/cze">cze</span></li>
		<li>...</li>
	</ul>
</div>
<div itemscope itemtype="http://schema.org/CategoryCode" itemid="http://id.loc.gov/vocabulary/iso639-2/cze">
	<meta itemprop="codeValue" content="cze">
	<h2>Czech; tchèque; Tschechisch</h2>
	<link itemprop="inCodeSet" href="http://id.loc.gov/vocabulary/iso639-2">
	<h3>From: ISO 639-2: Codes for the Representation of Names of Languages</h3>
	<span itemprop="name" xml:lang="en" content="Czech">English: Czech</span><br/>
	<span itemprop="name" xml:lang="fr" content="tchèque">French: tchèque</span><br/>
	<span itemprop="name" xml:lang="de" content="Tschechisch">German: Tschechisch</span><br/>
</div>

<div vocab="http://schema.org/" typeof="CategoryCodeSet" resource="http://id.loc.gov/vocabulary/iso639-2">
	<h1 property="name">ISO 639-2: Codes for the Representation of Names of Languages</h1>
	<h2>Listing of codes:</h2>
	<ul>
		<li>...</li>
		<li><span property="hasCategoryCode" resource="http://id.loc.gov/vocabulary/iso639-2/cze">cze</span></li>
		<li>...</li>
	</ul>
</div>
<div vocab="http://schema.org/" typeof="CategoryCode" resource=="http://id.loc.gov/vocabulary/iso639-2/cze">
	<meta property="codeValue" content="cze">
	<h2>Czech; tchèque; Tschechisch</h2>
	<link property="inCodeSet" href="http://id.loc.gov/vocabulary/iso639-2">
	<h3>From: ISO 639-2: Codes for the Representation of Names of Languages</h3>
	<span property="name" xml:lang="en" content="Czech">English: Czech</span><br/>
	<span property="name" xml:lang="fr" content="tchèque">French: tchèque</span><br/>
	<span property="name" xml:lang="de" content="Tschechisch">German: Tschechisch</span><br/>
</div>

[
	{
		"@context": "http://schema.org/"
	},
	{
		"@type": "CategoryCodeSet",
		"@id": "http://id.loc.gov/vocabulary/iso639-2",
		"name": "ISO 639-2: Codes for the Representation of Names of Languages"
		"hasCategoryCode": "http://id.loc.gov/vocabulary/iso639-2/cze"
	},
	{
		"@type": "CategoryCode",
		"@id": "http://id.loc.gov/vocabulary/iso639-2/cze",
		"codeValue": "cze",
		"name": {
			"en": "Czech",
			"fr": "tchèque",
			"de": "Tschechisch"
		},
		"inCodeSet": "http://id.loc.gov/vocabulary/iso639-2"
	}