Morph-based relations should be embedded.
It is not possible to have a “morph-based” relation (with /m) under non-morph based relation.
Info
See doc: https://grew.fr/doc/request/#injectivity-in-nodes-matching for explanation about
$notation
Embedded morph rel
Validation Pebble
- Schema: mSUD
pattern {
e: X -[!type]-> Y ; % A relation `e` without "/m"
m: T$ -[type=m]-> U$; % and a relation `m` with "/m"
e << m; % such that `e` is "below" `m`
}
% Note: the notation with '$' in "T$" and "U$" means
% that the two new nodes can be identical to X and/or Y
% If we write m: T -[type=m]-> U, many examples are lost.
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