Sub-child behavior definition in the same BDEF as its root view exists.

[ghawsi1901_55]

Hello everyone, 

I want to create a parent child relationship as shown here:

The problem is when I want to create the behavior definition of the sub-child in the same BDEF as its grand parent (root view) exist, I can't define the lock dependency for the sub-child because there is no direct association between root entity and sub-child entity. it would give the following error: 

"The behavior definition is "managed", which means that every entity must be flagged either as a "lock master" or as "lock dependent". So, how to define the behavior of sub-child in the same behavior definition file of its grand parent?

Note: The association is sub-child to child and from child to root. 

The second question is: How to expose the child and sub-child entities as embedded element of the parent entity? Now I can access the child entity with "/to_child" but I want to be able to use $expand parameter in the URI. Service bind is based on "OData V2 - Web API".

I mean something like: 

<Root>
   <element1></element1>
   <element2></element2>
   <childElement>
      <element1></element1>
      <subChildElement></subChildElement>
   </childElement>
</Root>

Source Codes:

1. Root view

define root view entity /CYCLES/t811c_view
  as select from t811c
  composition [0..*] of /CYCLES/t811s_view as _segments
  composition [1..*] of /CYCLES/T811G_view as _groups
{
  key tab,
  key cycle,
  key sdate,
      edate,
      rstatus,
      _segments,
      _groups
}

2. Child View

define view entity /CYCLES/t811s_view
  as select from t811s
  association to parent /CYCLES/t811c_view as _header on  $projection.tab   = _header.tab
                                                      and $projection.cycle = _header.cycle
                                                      and $projection.sdate = _header.sdate
  composition [1..*] of /CYCLES/T811k_view as _keyfields
  composition [1..*] of /CYCLES/T811F_view as _elementtable
{
  key tab,
  key cycle,
  key sdate,
  key seqnr,
      name,
      _header,
      _keyfields,
      _elementtable

}

3. Sub-child View

define view entity /CYCLES/T811k_view
  as select from t811k
  association to parent /CYCLES/t811s_view as _segment on  $projection.tab   = _segment.tab
                                                       and $projection.cycle = _segment.cycle
                                                       and $projection.sdate = _segment.sdate
                                                       and $projection.seqnr = _segment.seqnr
{
  key tab,
  key cycle,
  key sdate,
  key seqnr,
  key setkind,
  key pos,
      field,
      setname,
      valmin,
      valmax,
      setid,
      /* Association */
      _segment
}

4. Behavior Definition of Root view

managed implementation in class /cycles/bp_t811c_view unique;

define behavior for /CYCLES/t811c_view alias header
persistent table t811c
lock master
//authorization master ( instance )
//etag master <field_name>
{
  create;
  update;
  delete;
  association _groups { create; }
  association _segments { create; }


}

define behavior for /CYCLES/T811G_view alias group
persistent table t811g
lock dependent by _header
//authorization dependent by <association>
//etag master <field_name>
{
  update;
  delete;
  field ( readonly ) tab,cycle,sdate;
  association _header;
}

define behavior for /CYCLES/t811s_view alias segments
persistent table t811s
lock dependent by _header
//authorization dependent by <association>
//etag master <field_name>
{
  update;
  delete;
  field ( readonly ) tab,cycle,sdate;
  association _header;

}
/************************************
Here it gives the error
************************************/
define behavior for /cycles/t811k_view alias keyfields 
persistent table t811k
{
update;
delete;
field ( readonly ) tab,cycle,sdate,seqnr;
association _segment;
}

Thanks in advance.