> For the complete documentation index, see [llms.txt](https://standards.spdci.org/standards/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://standards.spdci.org/standards/dci-standards/early-warning-systems/wip-early-warning-systems-and-sp-system-interface/9.-ews/data/data-object/do.ews.04-resource.md).

# DO.EWS.04 Resource

Refers to an additional file with supplemental information related to this element; e.g., an image or audio file.

**Normative Reference:**\
OASIS Common Alerting Protocol (CAP) v1.2\
<https://docs.oasis-open.org/emergency/cap/v1.2/CAP-v1.2.html>

<table><thead><tr><th width="177.380615234375">Attribute</th><th width="194.3404541015625">Type</th><th width="131.9158935546875">Cardinality</th><th>Description</th></tr></thead><tbody><tr><td>resourceDesc</td><td><a data-mention href="/standards/standards-for-interoperability-interfaces/common-standards-for-interoperability-interfaces/data/data-types-and-formats/dt.com.02-string.md">DT.COM.02 string</a></td><td>1...1</td><td>The human-readable text describing the<br>type and content, such as “map” or “photo”,<br>of the resource file</td></tr><tr><td>mimeType</td><td><a data-mention href="/standards/dci-standards/early-warning-systems/wip-early-warning-systems-and-sp-system-interface/9.-ews/data/code-directory/cd.ews.09-mime_type.md">CD.EWS.09 mime_type</a></td><td>1...1</td><td>MIME content type and sub-type as<br>described in [RFC 2046]. (As of this<br>document, the current IANA registered<br>MIME types are listed at<br>http://www.iana.org/assignments/mediatypes/)</td></tr><tr><td>size</td><td><a data-mention href="/standards/standards-for-interoperability-interfaces/common-standards-for-interoperability-interfaces/data/data-types-and-formats/dt.com.03-integer.md">DT.COM.03 integer</a></td><td>0...1</td><td>(1) Approximate size of the resource file in<br>bytes.<br>(2) For based resources, &#x3C;si</td></tr><tr><td>uri</td><td><a data-mention href="/standards/standards-for-interoperability-interfaces/common-standards-for-interoperability-interfaces/data/data-types-and-formats/dt.com.02-string.md">DT.COM.02 string</a></td><td>0...1</td><td>A full absolute URI, typically a Uniform Resource Locator that can be used to retrieve the resource over the Internet<br>OR<br>a relative URI to name the content of a element if one is present in this resource block.</td></tr><tr><td>derefUri</td><td><a data-mention href="/standards/standards-for-interoperability-interfaces/common-standards-for-interoperability-interfaces/data/data-types-and-formats/dt.com.02-string.md">DT.COM.02 string</a></td><td>0...1</td><td>The base-64 encoded data<br>content of the resource file</td></tr><tr><td>digest</td><td><a data-mention href="/standards/standards-for-interoperability-interfaces/common-standards-for-interoperability-interfaces/data/data-types-and-formats/dt.com.02-string.md">DT.COM.02 string</a></td><td>0...1</td><td>The code representing the digital digest (“hash”) computed from the resource<br>file</td></tr></tbody></table>


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