description: This is an equivalent of the string on which the extension is sent, but includes additional XHTML markup, such as bold, italics, styles, tables, etc. Existing [restrictions on XHTML content](narrative.html#security) apply. Note that using [markdown](StructureDefinition-rendering-markdown.html) allows for greater flexibility of display. Like the [Resource Narrative](narrative.html), this extension may reference binary resources for image content (see note about [referencing images](narrative.html#id)).
package_name: hl7.fhir.uv.extensions
derivation: constraint
name: XhtmlRepresentation
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/rendering-xhtml'}
    index: 1
  value:
    constraint:
      xhtml-ext-1: {human: 'The XHTML contained here SHALL abide by the same constraints as narrative.  I.e. contain only the basic html formatting elements and attributes described in chapters 7-11 (except section 4 of chapter 9) and 15 of the HTML 4.0 standard,  elements (either name or href), images and internally contained style attributes', severity: error, expression: htmlChecks()}
    choices: [valueString]
    index: 3
  valueString:
    type: string
    constraint:
      xhtml-ext-1: {human: 'The XHTML contained here SHALL abide by the same constraints as narrative.  I.e. contain only the basic html formatting elements and attributes described in chapters 7-11 (except section 4 of chapter 9) and 15 of the HTML 4.0 standard,  elements (either name or href), images and internally contained style attributes', severity: error, expression: htmlChecks()}
    choiceOf: value
    index: 4
package_version: 5.3.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/rendering-xhtml
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.3.0
required: [valueString, value]