.. _Modify_CreatePropertyValueRuleFromTemplate:

Modify > Create property value rule from template
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This feature is available from the :ref:`ModifyMenu` of property declarations.
It can be used to quickly produce SHACL *property value rules* (using ``sh:values``)
for common design templates.

For example, you may have a *child* property that links a parent with her offsprings,
and a second property that shall compute the number of children based on the asserted child values.
To do so, create a *child count* attribute with datatype integer and then open this wizard
and select the *Count number of property values* template.
This will add the necessary ``sh:values`` statements to have the *child count* automatically computed when needed.


**Further Reading on SHACL**

* `Form Generation using SHACL and DASH (External Link) <https://datashapes.org/forms.html>`_
* `SHACL Advanced Features Specification (External Link) <https://w3c.github.io/shacl/shacl-af/>`_
* `SHACL W3C Specification (External Link) <https://www.w3.org/TR/shacl/>`_

**Further Reading on Ontologies**

* :ref:`working_with_ontologies_target`

**Further Reading on Modify Menu**

* :ref:`scripting_actions`

**Further Reading on TopBraid**

* :ref:`introduction`