Sitecore - Restrict item by Data Template Type on a Field -

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I would like to restrict the data types of those items, which a user can select on the field. I can do it with the inclusion of tree nodes in the source of the field, but it seems a little open for abuse - says that if a developer accidentally takes an item of the wrong type under this node then the system falls down I'm probably worried about this, but in other CMS I have the ability to restrict the type of item that the user can choose. What is the best way to go about this.

for field types traelist or multilist You can set additional parameters such as IncludeTemplatesForSelection , 

  DataSource = / sitecore / content / home / employees with parameters of the  source  field You can. ; TemplateForce Selection = Employee   
 Here is a post explained and here is another name.

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