The extended object expression is used to identify multiple objects or elements with the same attributes.

A valid term for the extended object expression can be either of a specialForm, the normalForm or the isoForm. For further reference to the specialForm and the normalForm, please refer to the WebCGM 2.0 fragment syntax.

Please find below a description of the isoForm syntax. The isoForm is always introduced by the isoeval keyword.

and can then address either Object ID, Name, Tip. It can also check for the existence of object information and check any other added attribute. Furthermore it is possible to access text elements.

To address objects by their the name attribute you have three possible methods. The objNameTerm supports check for existing name attribute and the nonexistence of a name attribute. Objects may be addressed by parts of the value of the name attribute.

The keywords below need to be used to build the object expression.

Objects may also be addressed by their object tip attribute. Once more, objects can be addressed by either having a tip attribute connected, and by certain values of the tip attribute.

The attributes can be checked for their content. Either the attribute will be checked if equal or not equal to a certain value. It is also possible to check whether an attribute content contains a certain value.

Please use the keywords and syntax given below.

Text elements can also be addressed. As a criteria their value is taken.

Here we can test either if a text element is exactly equal to a certain value,