core + meta (Meta Extension): terms used within schema.org for schema definitions.

identifier

Canonical URL: http://schema.org/identifier

Thing > Property > identifier

The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
PropertyValue
Text
URL
Used on these types
Thing
Sub-properties
accountId
confirmationNumber
duns
flightNumber
globalLocationNumber
gtin12
gtin13
gtin14
gtin8
isbn
issn
legislationIdentifier
leiCode
orderNumber
productID
serialNumber
sku
taxID


Examples

Example 1
<p>
Title: Library linked data in the cloud : OCLC's experiments with new models of resource description<br/>
Author: Carol Jean Godby<br/>
ISBN: 9781627052191<br/>
oclcnum: 889647468<br/>
Details: <a href="http://www.worldcat.org/oclc/889647468">WorldCat.org</a>
</p>
<p itemscope itemtype="http://schema.org/Book">
Title: <span itemprop="name">Library linked data in the cloud : OCLC's experiments with new models of resource description</span><br/>
Author: <span itemprop="author>Carol Jean Godby</span><br/>
ISBN: <span itemprop="isbn">9781627052191</span><br/>
<link itemscope itemprop="identifier" itemptype="http://schema.org/PropertyValue">
<span itemprop="propertyID">OCoLC</span>:
<span itemprop="value">889647468</span>
</link><br/>
Details: <a itemprop="sameAs" href="http://www.worldcat.org/oclc/889647468">WorldCat.org</a>
</p>
<p vocab="http://schema.org/" typeof="Book">
Title: <span property="name">Library linked data in the cloud : OCLC's experiments with new models of resource description</span><br/>
Author: <span property="author>Carol Jean Godby</span><br/>
ISBN: <span property="isbn">9781627052191</span><br/>
<link property="identifier" typeof="PropertyValue">
<span property="propertyID">OCoLC</span>:
<span property="value">889647468</span>
</link><br/>
Details: <a property="sameAs" href="http://www.worldcat.org/oclc/889647468">WorldCat.org</a>
</p>
{
 "@context": "http://schema.org/",
 "@type": "Book",
 "name": "Library linked data in the cloud : OCLC's experiments with new models of resource description",
 "author": "Carol Jean Godby",
 "isbn": "9781627052191"
 "identifier": {
 "@type": "PropertyValue",
   "propertyID": "OCoLC",
   "value":  "889647468"
   },
 "sameAs": "http://www.worldcat.org/oclc/889647468"
}
Example 2
<div">
Company Record
<h1>A UK Organization Ltd</h1>
Registered office address: 1 A Street, London<br/>
Company Number: 99065782
</div>
<div itemscope itemtype="http://schema.org/LocalBusiness">
Company Record
<h1 itemprop="name">A UK Organization Ltd</h1>
Registered office address: <span itemprop="address">1 A Street, London</span><br/>
<link temscope itemprop="identifier" itemptype="http://schema.org/PropertyValue">
<span itemprop="propertyID">Company Number</span>:
<span itemprop="value">99065782</span>
</link><br/>
</div>
<div vocab="http://schema.org/" typeof="LocalBusiness">
Company Record
<h1 property="name">A UK Organization Ltd</h1>
Registered office address: <span property="address">1 A Street, London</span><br/>
<link property="identifier" type="PropertyValue">
<span property="propertyID">Company Number</span>:
<span property="value">99065782</span>
</link><br/>
</div>
{
 "@context": "http://schema.org/",
 "@type": "LocalBusiness",
 "name": "A UK Organization Ltd",
 "address": "1 A Street, London"
 "identifier": {
 "@type": "PropertyValue",
   "propertyID": "Company Number",
   "value":  "99065782"
   },
}

Schema Version 3.3