JcrContentModelTranslations

Shared UUID

Advantages:

Referencing a node without specifying the language is possible (e.g., fallback to the default language if a translation doesn't exist)

Issues:

JCR allows only one node with a particular UUID
- Either use a referenceable language-independent node
- Or don't use JCR UUIDs for references, but custom String-value properties
With JCR UUIDs and a common referenceable parent node, structures like /en/welcome, /de/willkommen are not possible (would require separating the content hierarchy from the URI structure)

Non-Shared UUID

Advantages:

JCR UUIDs could be used
Arbitrary content hierarchies / URI structures
Automatic referencial integrity check with respect to language version (i.e., /foo_de can't be removed if /bar_de points to it)

Issues:

References can only point to a particular translation
A. Common parent node or artificial node
- Influences content hierarchy (and maybe URL structure)
- Obtain all translations of an artificial common node using Node.getReferences()
B. No common parent node: relations between translations have to be maintained (or is this optional?)
- B.1. via multi-value reference property at each translation
- B.2. via language-independent node
- In either case, translations are not self-contained anymore

Examples:

Non-shared UUID, arbitrary structure

/de
  /willkommen
    /jcr:uuid = 1
    /jcr:language = "de"
    /lenya:translations = { 2 }
/en
  /welcome
    /jcr:uuid = 2
    /jcr:language = "en"
    /lenya:translations = { 1 }

Non-shared UUID, arbitrary structure, explicit translation references

/welcome_de
  /jcr:uuid = 1
  /jcr:language = "de"
  /lenya:translations = { 2 }
/welcome_en
  /jcr:uuid = 2
  /jcr:language = "en"
  /lenya:translations = { 1 }

Non-shared UUID, arbitrary structure, implicit translation references via URL structure (String operations)

/welcome_de
  /jcr:uuid = 1
  /jcr:language = "de"
/welcome_en
  /jcr:uuid = 2
  /jcr:language = "en"

Non-shared UUID, common parent node

/welcome
  /de
    /jcr:uuid = 1
    /jcr:language = "de"
  /en
    /jcr:uuid = 2
    /jcr:language = "en"

Shared UUID, common parent node

/welcome
  /jcr:uuid = 1
  /de
    /jcr:language = "de"
  /en
    /jcr:language = "en"

Shared UUID, artificial shared node

/de
  /willkommen
    /lenya:sharedDocumentNode = 1
    /jcr:language = "de"
/en
  /welcome
    /lenya:sharedDocumentNode = 1
    /jcr:language = "en"
/lenya:sharedDocumentNodes
  /welcome
    /jcr:uuid = 1

Shared UUID, default language node is referenceable

Optional node type mix:referenceable assigned only to default-language nodes
Default-language node must exist

/de
  /willkommen
    /lenya:defaultLanguageNode = 1
    /jcr:language = "de"
/en
  /welcome
    /jcr:uuid = 1
    /jcr:language = "en"

Shared custom UUIDs

/welcome_de
  /lenya:uuid = 1
  /jcr:language = "de"
/welcome_en
  /lenya:uuid = 1
  /jcr:language = "en"