See the common FAQ’s and troubleshooting tips for attributes and attribute filters in Adobe FrameMaker.
If you make changes in the content or the filter expression, you will need to apply the filter to the topic. For example, if you apply a filter to the topic and then define an attribute for an element that is included in the filter, the filter is not immediately applied to the updated content. You need to apply the filter to the topic.
You need to take care not to break the structure of the topic. If the filter that you apply to a topic causes a mandatory element to be hidden, the topic structure is broken. FrameMaker does not prevent you from doing this; however, the Structure View will indicate the break in the topic.
If a filter causes a parent element to be hidden then the child elements are hidden, irrespective of the attributes applied to the child elements. However, if a filter causes a parent to be shown and a child to be hidden, the child is hidden.