TonyM wrote:
>
> With two parents in genealogy it is recognised there is a patralinial and
> matralinial tree and when exploring relationships one chooses which tree to
> follow with, towards ancestors or descendants.
>
I get where you are coming from. I just thought it worth re-iterating what
I have written on this before.
Actual Western kinship systems are dominantly *bilateral* (descent includes
mother & father; with a complication being married names which tend to be
mainly patrilineal). Of course it is more complex than that (deaths of
parents, remarriage, retain maiden name, sorority, adoption, step-children,
same sex marriage etc.)
The point is *you need bilateral structure to even begin to depict it at
all adequately*.
Once you have that structure the complications can be addressed.
In anthropology the "categorical kinship system" *has to be bilateral *because
it is a "meta-level" system showing how cultures differently depict and
understand kinship (which is a system of "categories for relatives" based,
ultimately [in one way or another], on biology). Lineages & clans are
social models that are sub-sets of that.
And there is one big issue, apart from figuring out how to enter data
correctly to cross-connect children & parents: the limits of HTML lists.
They cannot branch from conjunction ("marriage"). They do okayish with
unilineal descent (patri or matri) but bilateral is, as far as I can see,
impossible in HTML lists.
So another way to display is needed in the HTML output.
I'm aware that the focus in this thread is not necessarily on human
kinship.
But I do think that the problems depicting, especially bilateral, descent
is a concrete common case worth attention.
BTW, unilineal descent has been depicted pretty successfully already in TW
several times. Bimlas does it extremely well. Mat also did it in a simple
way using CSS + lists.
(I can maybe find the posts if there is interest.)
Best wishes
TT
>
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