...

• (PoC) Store and validate a set of modules (a model file)
• (Full project) Load a model instance and validate it given a model set reference.(using a separate SPI)

1.2   Anchor

...

persistence

1.2.1       Anchor

...

persistence/retrieval

A system or human user should be able to create an anchor point . This serves the purpose of providing a name (or ID) for the model data and a root for the structure (together with the odd case of floating leaves at the top of a module).  

As a user of CPS I want to be able to: 

• Create an anchor point given a name and a dataspace 
• Retrieve an anchor point and the associated attributes given a name and a dataspace
• List the anchor points anchors in the system given a dataspace
• Delete an anchor point anchors given a name and a dataspace 

An anchor point name shall be unique within a dataspace. Duplicates shall be rejected. If a dataspace is not defined in the system, it shall be created upon anchor point creation. 

1.2.2       Anchor

...

models set association

A system or human user should be able to associate an anchor point to a model set. 

...

• Associate an anchor point to a module set given an anchor point and a module set reference. (upon creation)
• Retrieve a model set reference, given an anchor point 

1.3       Fragment (Node) Persistence

1.3.1       Fragment (Node) persistence

A system or human user should be able to persist and retrieve a model data fragment ie. Node under a parent fragment. A fragment is considered an anchor point, a container or a list element, the xpath identifying the fragment together with the leaf and leaf-list attributes.
As a user of CPS I want to be able to:

• Persist a fragment given an
  • Anchor point
• Retrieve a fragment given a
  • anchor pointAnchor
  • Xpath expression (limited to path and key equality, e.g. /A/B/C will grab a container while /A/B/C/ L[@key1='a key'][@key2='another key'] will grab a keyed list element)

...

As a user of CPS I want to be able to:

• Retrieve the anchor point Anchor of a fragment Node given an
  • A fragmentNode

1.4.3       Containment Query

...

• Retrieve all the relevant fragments (nodes) given an
  • Schema node identifier  

2        Database backend

...