The allowedParents property is an array of paths to the components where defining component can be used. In my understanding, it is not the component name in the page that is defined but the component type. If you do not have a component type that is called /apps/something/something/article then I don't think that is would work.
What we have done, when we want paragraps that has restricted set of allowed children is one of two things.
1. Define the allowedChildren in the parent type definition such as a paragraph.
2. Create a new type of component that only in name override the parent.
One example of the first is when we want a Fact Summary Page to have either Corporate Facts Page, Historic Facts Page or Fun Facts Page as a child. They are all based on the Page Component Fact Page but contains different default sets of text and image components.
allowedParents="[/apps/mysite/templates/facts/corporate_facts_page,/apps/mysite/templates/facts/historic_facts_page,/apps/mysite/templates/facts/fun_facts_page, /apps/mysite/components/pages/facts_page]">
An example of the later is when we have the Product page wher we in the paragraph either could do as in case 1, but then have to release a new version every time we add a component that is "Product aware" (and that sux). So what we did was that we created the component /apps/mysite/components/productpar that only has the parsys as the supertype. This makes it possible for us to define the allowedParent="[*/productpar]" in all our product aware components. Then we don't really need to know what that product paragraph is called in the page.
Did this help??
/Ove
Update to this thread: Please note that the allowedParents/allowedChildren properties should only be applied on Templates (not on Components).
