Create attributes containing links to other components (classes)

[richardmarston]

Component attribute links

Currently we read the primitive attributes and assign values to the class properties. However, we ignore links to other classes. When a reference to another class is discovered, we need to:

• find out if the relationship between the two classes is 1:1 or 1:n
• ensure that both classes have been created in the map
• populate the link and the reverse link with the object references
  • if it's 1:n, we will add the reference to the list if it's not already there
  • if it's 1:1, we will set the variable to the reference

@m-mirz This is a slight variation on the lazy-linking strategy we discussed. Instead of storing the rdfid and then later updating with a reference, we just create the linked class, which will later have the attributes filled in. A possible problem with this approach is that we could end up creating components that only exist in the file as links. However:

• there's not a huge difference between a broken link and an empty component
• that file is badly formed already
• I'm not convinced that leaving a broken link is a better strategy