The default validation rules

Version: 10.4

The following tables describe default item and field validation rules that are available at /sitecore/System/Settings/Validation Rules. This list is not exhaustive.

Item validation rules

Item validation rule	Verifies...
Broken Links	All languages and all versions for broken links in one or more fields.
Item is not referenced	That the item is not referenced by any other items. This might indicate that the item is unused and can be deleted.
Duplicate Name	That the item name is unique among siblings.
Duplicate Sort Order	That the item has a unique sort-order.
Full Page XHtml	The XHTML generated when a visitor requests an item.
Name Encoded Character	That the item name does not contain both encoded and unencoded characters.
Media Size Too Big	Whether a Media Library item exceeds a specific size.
Publish Unpublish Date Range	That the publish date is before the unpublish date.
Reminder is after Archive Date	That the reminder date is before the archive date.
Url Characters	If an item name contains characters that must be escaped when rendering URLs, which negatively impacts search engine indexing.
Valid From Valid To Date Range	That the valid from date is before the valid to date.

Field validation rules

Field validation rule	Verifies...
Broken Links	If a field contains broken links.
Is Email	If a field contains an email address.
Is Integer	If a field contains an integer.
Is Integer with Zero Allowed	That a field is a valid integer (zero allowed).
Is Percentage	That the field is a valid percentage.
Is XHtml	If a field contains XHTML.
Max Length 40	If a field contains a value of 40 or fewer characters.
Rating 1 to 9	If a field contains a value between 1 and 9.
Required	If a field contains a value.
Spellcheck	Spelling using the RAD Editor spell check validation, also used in the Rich Text editor.
Type and Assembly	If the value properly references a class in an accessible assembly.
W3C XHtml Validation	That the field HTML uses the W3C validation service (the CMS must have Internet access).

System field validation rules

System field validation rule	Verifies...
Alt Required	That the alt text is filled in.
Circular Dependency Validator	That values picked in multilists are different from the item that defines the field.
Database Name	That the field must contain a valid database name.
Extension May Not Start with a Dot	That the media file extension does not start with a dot.
Extern Link Target	The external links, that is the links to other sites.
File Exists	That the file exists.
GUID	That the field must contain a valid Guid value.
Image Has Alt Text	That there is alt text on an image.
Image Has Alt Text from Media Library	If the media item has default alt text. The default alt text (from the Media library) is used.
Image Size	The size for the images referenced through image fields.
Is Xml	That the field contains valid XML.
Linked Item Has Allowed Template	That the item selected has the allowed template.
Parameters String	That the field contains a valid parameters string (a=1&b=2&c=3).
Reset to Standard Value	That the field contains the same value as the Standard Value and can be reset.
Rich Text Image Size	The image dimensions for the images included in the rich text fields, that is if the image is too big to look good in the site design.
Rule Elements Type Field Validator	That the Rule field has no referenced conditions or actions with a broken Type field and the type is not obsolete.
Sitecore Command	That the field contains a valid Sitecore command defined in the `commands.config` file.
Type and Assembly	That the field points to a valid type in an existing assembly.
Unique Placeholder Key	That the placeholder key is unique.

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