Breadcrumbs Pattern

Hello!

I am trying to figure out the best way to manage the Breadcrumbs Pattern, but I can't seem to grasp the way it is intended to be used.

{
  a!localVariables(
    local!currentNodeId: 4,
    /* This variable would normally be retrieved with a rule like rule!getBreadcrumbsForIdentifier(identifier: local!currentNodeId). */
    local!nodes: a!forEach(
      items: enumerate(local!currentNodeId) + 1,
      expression: choose(
        fv!item,
        a!map(name: "Home", identifier: 1),
        a!map(name: "My Documents", identifier: 2),
        a!map(name: "Strategy", identifier: 3),
        a!map(name: "2018 Road Map", identifier: 4)
      )
    ),
    {
      a!richTextDisplayField(
        labelPosition: "COLLAPSED",
        value: {
          a!forEach(
            items: local!nodes,
            expression: if(
              fv!isLast,
              a!richTextItem(text: fv!item.name, style: "STRONG"),
              {
                a!richTextItem(
                  text: fv!item.name,
                  /* The saveInto in this link would run the query or rule necessary to navigate the user to *
                   * the node in the breadcrumbs that they just clicked on.                                  */
                  link: a!dynamicLink(
                    value: fv!item.identifier,
                    saveInto: local!currentNodeId
                  ),
                  linkStyle: "STANDALONE"
                ),
                a!richTextItem(text: "  /  ", color: "SECONDARY")
              }
            )
          )
        }
      )
    }
  )
}

I'm particularly confused by the way we are supposed to redirect the user to other screens and get the identifier. Does it mean that every page needs an identifier? How do I manage this data?

The only application of this pattern I saw uses a CDT called "Breadcrumbs" (without a table) and constants-pointers to objects we are redirecting to, but this way seems not to be as programmatic as it could be.

What would be the best way to solve this?