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additionalProperty

A Schema.org Property
A property-value pair representing an additional characteristics of the entitity, e.g. a product feature or another characteristic for which there is no matching property in schema.org.

Note: Publishers should be aware that applications designed to use specific schema.org properties (e.g. https://schema.org/width, https://schema.org/color, https://schema.org/gtin13, ...) will typically expect such data to be provided using those properties, rather than using the generic property/value mechanism.
Values expected to be one of these types
PropertyValue
Used on these types
Place
Product
QualitativeValue
QuantitativeValue
Examples

Example 1
Copied
Example notes or example HTML without markup.
<h2>Beach in Mexico</h2>
<img src="mexico-beach.jpg" alt="" />
By Jane Doe
Photographed in Puerto Vallarta, Mexico
Date uploaded: Jan 25, 2008
I took this picture while on vacation last year.
<!-- We assume the following EXIF meta-data is available, but currently not shown:

Exposure Time:    1/659 sec.
FNumber:          f/4.0
MaxApertureValue: 2.00
Metering Mode:    Pattern
Flash:            Flash did not fire.
-->
Example encoded as Microdata embedded in HTML.
<div itemscope itemtype="https://schema.org/ImageObject">
  <h2 itemprop="name">Beach in Mexico</h2>
  <img src="mexico-beach.jpg" alt="" itemprop="contentUrl" />
  By <span itemprop="author">Jane Doe</span>
  Photographed in
    <span itemprop="contentLocation">Puerto Vallarta, Mexico</span>
  Date uploaded:
    <meta itemprop="datePublished" content="2008-01-25">Jan 25, 2008
  <span itemprop="description">I took this picture while on vacation last year.</span>
<!-- Note: We do not split value strings in unit and value information, since this the raw EXIF data does not provide this granularity. If you are able to separate the unit, you can use the unitText property -->
  <div itemprop="exifData" itemscope itemtype="https://schema.org/PropertyValue">
      <meta itemprop="name" content="Exposure Time">
      <meta itemprop="value" content="1/659 sec.">
  </div>
  <div itemprop="exifData" itemscope itemtype="https://schema.org/PropertyValue">
      <meta itemprop="name" content="FNumber">
      <meta itemprop="value" content="f/4.0">
  </div>
  <div itemprop="exifData" itemscope itemtype="https://schema.org/PropertyValue">
      <meta itemprop="name" content="MaxApertureValue">
      <meta itemprop="value" content="2.00">
  </div>
  <div itemprop="exifData" itemscope itemtype="https://schema.org/PropertyValue">
      <meta itemprop="name" content="Metering Mode">
      <meta itemprop="value" content="Pattern">
  </div>
  <div itemprop="exifData" itemscope itemtype="https://schema.org/PropertyValue">
      <meta itemprop="name" content="Flash">
      <meta itemprop="value" content="Flash did not fire.">
  </div>
</div>
Example encoded as RDFa embedded in HTML.
<div vocab="https://schema.org/" typeof="ImageObject">
  <h2 property="name">Beach in Mexico</h2>
  <img src="mexico-beach.jpg" alt="" property="contentUrl" />
  By <span property="author">Jane Doe</span>
  Photographed in
    <span property="contentLocation">Puerto Vallarta, Mexico</span>
  Date uploaded:
    <meta property="datePublished" content="2008-01-25">Jan 25, 2008
  <span property="description">I took this picture while on vacation last year.</span>
<!-- Note: We do not split value strings in unit and value information, since this the raw EXIF data does not provide this granularity. If you are able to separate the unit, you can use the unitText property -->
  <div property="exifData" typeOf="PropertyValue">
      <meta property="name" content="Exposure Time">
      <meta property="value" content="1/659 sec.">
  </div>
  <div property="exifData" typeOf="PropertyValue">
      <meta property="name" content="FNumber">
      <meta property="value" content="f/4.0">
  </div>
  <div property="exifData" typeOf="PropertyValue">
      <meta property="name" content="MaxApertureValue">
      <meta property="value" content="2.00">
  </div>
  <div property="exifData" typeOf="PropertyValue">
      <meta property="name" content="Metering Mode">
      <meta property="value" content="Pattern">
  </div>
  <div property="exifData" typeOf="PropertyValue">
      <meta property="name" content="Flash">
      <meta property="value" content="Flash did not fire.">
  </div>
</div>
Example encoded as JSON-LD in a HTML script tag.
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "ImageObject",
  "author": "Jane Doe",
  "contentLocation": "Puerto Vallarta, Mexico",
  "contentUrl": "mexico-beach.jpg",
  "datePublished": "2008-01-25",
  "description": "I took this picture while on vacation last year.",
  "name": "Beach in Mexico",
  "exifData": [
    {
      "@type": "PropertyValue",
      "name": "Exposure Time",
      "value": "1/659 sec."
    },
    {
     "@type": "PropertyValue",
      "name": "FNumber",
      "value": "f/4.0"
    },
    {
      "@type": "PropertyValue",
      "name": "MaxApertureValue",
      "value": "2.00"
    },
    {
      "@type": "PropertyValue",
      "name": "Metering Mode",
      "value": "Pattern"
    },
    {
      "@type": "PropertyValue",
      "name": "Flash",
      "value": "Flash did not fire."
    }
  ]
}
</script>
Structured representation of the JSON-LD example.
Example 2
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Example notes or example HTML without markup.
<!-- Product: Point Value, with unit as text -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Approx. Weight</span>
      <span>450</span>
      <span>gram</span>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Point Value, with unit as text -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Approx. Weight</span>
      <span itemprop="value">450</span>
      <span itemprop="unitText">gram</span>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 3
Copied
Example notes or example HTML without markup.
<!-- Product: Point Value, with unit as UN/CEFACT Common Code to be added to the template -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Approx. Weight</span>
      <span>450</span>g
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Point Value, with unit as UN/CEFACT Common Code -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Approx. Weight</span>
      <span itemprop="value">450</span>
      <meta itemprop="unitCode" content="GRM">g
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 4
Copied
Example notes or example HTML without markup.
<!-- Product: Range, with unit as UN/CEFACT Common Code to be added to the template -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Operating Voltage</span>
      <span>100</span>-
      <span>250</span>
      volts
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Range, with unit as UN/CEFACT Common Code -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Operating Voltage</span>
      <span itemprop="minValue">100</span>-
      <span itemprop="maxValue">250</span>
      <meta itemprop="unitCode" content="VLT">volts
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 5
Copied
Example notes or example HTML without markup.
<!-- Product: Open Interval, with unit as UN/CEFACT Common Code to be added to the template -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Wifi range</span>: up to
      <span>30</span>
      ft.
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Open Interval, with unit as UN/CEFACT Common Code -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Wifi range</span>: up to
      <span itemprop="maxValue">30</span>
<!-- Note: The UN/CEFACT Common Code for foot is FOT -->
      <meta itemprop="unitCode" content="FOT">ft.
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 6
Copied
Example notes or example HTML without markup.
<!-- Product: Multiple Intervals -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Operating voltage</span>:
      <span>9-12</span> or
      <span>100-250</span>
      volts
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Multiple Intervals -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Operating voltage</span>:
      <span itemprop="value">9-12</span> or
      <span itemprop="value">100-250</span>
      <meta itemprop="unitCode" content="VLT">volts
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 7
Copied
Example notes or example HTML without markup.
<!-- Product: Boolean Value -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>USB interface</span>: Yes
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Boolean Value -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">USB interface</span>:
      <meta itemprop="value" content="True">Yes
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 8
Copied
Example notes or example HTML without markup.
<!-- Product: Qualitative Value -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Interface</span>: <span>USB</span>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Qualitative Value -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Interface</span>:
      <span itemprop="value">USB</span>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 9
Copied
Example notes or example HTML without markup.
<!-- Product: Qualitative Value (multiple) -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Interfaces</span>:
      <span>USB</span>,
      <span>Ethernet</span>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Qualitative Value (multiple) -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Interfaces</span>:
      <span itemprop="value">USB</span>,
      <span itemprop="value">Ethernet</span>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 10
Copied
Example notes or example HTML without markup.
<!-- Product: Property ID for clarifying the meaning of a property: URI from external vocabulary -->
<!-- (see microdata example for comparison) -->
<div>
  <img src="station_waggon123.jpg" alt="" />
  <span>Station Waggon 123</span>
  <div>
      <span>Luggage Capacity (seats folded)</span>:
      <span>500</span>
      liter
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Property ID for clarifying the meaning of a property: URI from external vocabulary -->
<div itemscope itemtype="https://schema.org/Car">
  <img itemprop="image" src="station_waggon123.jpg" alt="" />
  <span itemprop="name">Station Waggon 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Luggage Capacity (seats folded)</span>:
      <span itemprop="value">500</span>
      <meta itemprop="unitCode" content="LTR">liter
      <link itemprop="propertyID" href="http://purl.org/vvo/ns#luggageCapacitySeatsFolded" />
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 11
Copied
Example notes or example HTML without markup.
<!-- Product: Property ID for clarifying the meaning of a property: Code from eCl@ss Standard -->
<!-- The Property code 02-AAM226 is for "USB interface present" in eCl@ss 8.1
(see microdata example for comparison) -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>USB Interface</span>:Yes
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Property ID for clarifying the meaning of a property: Code from eCl@ss Standard -->
<!-- The Property code 02-AAM226 is for "USB interface present" in eCl@ss 8.1 -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">USB Interface</span>:
      <meta itemprop="value" content="True">Yes
      <meta itemprop="propertyID" content="eclass81:02-AAM226">
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 12
Copied
Example notes or example HTML without markup.
<!-- Product: Value References -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <span>Operating Voltage</span>
      <span>100</span>-
      <span>250</span>
      volts
      at
      <div>
         <span>50</span>
         <span>Hz</span>
      </div>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Value References -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Operating Voltage</span>
      <span itemprop="minValue">100</span>-
      <span itemprop="maxValue">250</span>
      <meta itemprop="unitCode" content="VLT">volts
      at
      <div itemprop="valueReference" itemscope itemtype="https://schema.org/PropertyValue">
         <span itemprop="value">50</span>
         <span itemprop="unitText">Hz</span>
      </div>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 13
Copied
Example notes or example HTML without markup.
<!-- Product: Ratios -->
<div>
  <img src="station_waggon123.jpg" alt="" />
  <span>Station Waggon 123</span>
  <div>
      <span>Fuel consumption</span>:
      <span>5</span>
      <meta>liter</span> /
      <div>
        <span>100</span>
        <span>km</span>
      </div>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Ratios -->
<div itemscope itemtype="https://schema.org/Car">
  <img itemprop="image" src="station_waggon123.jpg" alt="" />
  <span itemprop="name">Station Waggon 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <span itemprop="name">Fuel consumption</span>:
      <span itemprop="value">5</span>
      <meta itemprop="unitCode" content="LTR">liter /
      <div itemprop="valueReference" itemscope itemtype="https://schema.org/PropertyValue">
        <span itemprop="value">100</span>
        <span itemprop="unitText">km</span>
      </div>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.
Example 14
Copied
Example notes or example HTML without markup.
<!-- Product: Grouping and Hierarchical Order of Properties -->
<div>
  <img src="camera123.jpg" alt="" />
  <span>Digital Camera 123</span>
  <div>
      <strong>Focus/Autofocus</strong>
      <div>
        <span>Picture Control</span>
        <span>Landscape</span>
        <span>Monochrome</span>
        <span>Portrait</span>
      </div>
      <div>
        <span>Single-point AF Mode</span>: Yes
      </div>
  </div>
</div>
Example encoded as Microdata embedded in HTML.
<!-- Product: Grouping and Hierarchical Order of Properties -->
<div itemscope itemtype="https://schema.org/Product">
  <img itemprop="image" src="camera123.jpg" alt="" />
  <span itemprop="name">Digital Camera 123</span>
  <div itemprop="additionalProperty" itemscope itemtype="https://schema.org/PropertyValue">
      <strong itemprop="name">Focus/Autofocus</strong>
      <div itemprop="value" itemscope itemtype="https://schema.org/PropertyValue">
        <span itemprop="name">Picture Control</span>
        <span itemprop="value">Landscape</span>
        <span itemprop="value">Monochrome</span>
        <span itemprop="value">Portrait</span>
      </div>
      <div itemprop="value" itemscope itemtype="https://schema.org/PropertyValue">
        <span itemprop="name">Single-point AF Mode</span>:
        <meta itemprop="value" content="True">Yes
      </div>
  </div>
</div>
Example encoded as RDFa embedded in HTML.
No RDFa
Example encoded as JSON-LD in a HTML script tag.
No JSON-LD
Structured representation of the JSON-LD example.