LinkedQL Followup Tasks

[iddan]

Followup tasks to https://github.com/cayleygraph/cayley/issues/877

• [ ] Prefixes methods @iddan
  • [x] POC Implementation
  • [ ] Move implementation to clients
• [ ] .rename({ [property: string]: IRI }) should replace .save(IRI, tag) for aliasing property name to something else. (+ .renameReverse()). There is no such operator in Gremlin but there is one in MongoDB's aggregation @iddan
• [ ] .properties() called empty should save all properties (requires Path.save(Path) @dennwc)
• [x] Generic .documents()
• [x] Nicer API for automatic type conversion @iddan:
  • [x] Valid ID string to IRI or BNode
  • [x] IRI to properties path
• [x] Refactor Filter and Operator @iddan (https://github.com/cayleygraph/cayley/pull/909)
  • [x] Numeric operators
  • [x] Pattern operators
• [ ] .match(pattern) should be used for flat and deep matching of objects using structure pattern @iddan (https://github.com/cayleygraph/cayley/pull/916). For example:

  .match({
      "address": {
          "street": { "@id": "yehuda-halevi" }
          "number": 33,
      },
  })

  • [x] Flat match
  • [x] Deep match
  • [ ] Empty match to match entities only
  • [ ] Improve path structure. Currently using path.Out().Back(). Need help @dennwc
  • [ ] Use a stable comparison between paths in test as shape is unstable. Need help @dennwc
• [x] Rename view to visit @iddan
• [ ] Make the schema the source of truth @iddan
  • [ ] Missing Information about min cardinality of fields (can be used in some type systems and in all runtimes)
• [ ] Step to collect lists (https://github.com/cayleygraph/cayley/pull/920) In Gizmo lists can be saved like:

  g.V().followRecursive(g.M().save(g.IRI("rdf:first"), "item").out(g.IRI("rdf:last")))

  But it has limitations, hard to optimize and to understand. Instead, we should have a method to do this:

  .collect("item")

  • [x] Basic implementation
  • [ ] Should figure out desired behavior when not using Documents
  • [ ] Should validate the performance
• [ ] Get rid of properties terminology from the API. Properties should always be named names
• [ ] Project step
  • [ ] Fix back for all morphisms (labels and predicates are currently not implemented)
  • [ ] Basic implementation
  • [ ] Validate it can replicate *as steps and remove them.
• [ ] Return documents by default
  • [ ] Change return type of steps to quads and move conversion to JSON-LD outside the steps.
  • [ ] Refactor Select to use quads return type
  • [ ] Refactor Documents to use quads return type
  • [ ] Remove Documents step and use it's logic as default return