Domain Tool

See (p1,realdom) for information about the use of this key. All calls to the DOMAIN_TOOL are prompt. See (p1,synergism) about why domain tools are non fundamental {not needed in theory}.

DOMAIN_TOOL(0;NK==>c;DK) produces a domain key that designates the node designated by the node key NK. c is zero if NK is a node key and −1 otherwise. The databyte of DK is 0.

{Rights Amplification}If (E is a start key and n is 1, or E is a return or fault key and n is 2, or E is a domain key and n is 3) and E's brand {C0 of E's domain} is B then DOMAIN_TOOL(n;E,B ==> b;N) returns the databyte of E in b and returns a node key {with 0 databyte} to E's domain root. Otherwise the call returns −1 in b and DK(0) in N.

p3,res-ex

(Order codes 5, 6, 7, 9, 10 & 11) If (S is a segment key with a segment keeper key and the no-call bit off and n is 4, or S is a meter key and n is 8) and S's keeper key is (a start key and m is 1, or a return or fault key and m is 2, or a domain key and m is 3) and B is the brand of S's keeper, then DOMAIN_TOOL(n+m;S,B ==> c+256*s;N) will return a node key N to the node designated by S, c is the databyte from S, s is the slot number in node S which holds the keeper key, N has the same databyte as S. Otherwise c=−1 and s=0 and N is DK(0). The databyte of a meter key is 0. This function of the domain tool does not allow the tool holder to discover information that could otherwise be considered safely hidden.

See (scne) concerning exclusion of restart keys.

{ni}I propose that if S is a segment key with the no-call bit on then a sense key to the node be returned.

DOMAIN_TOOL(kt;==>c;) puts X'0109' in c.

See (p1,realdom) for reasons for restricting this entry. See also (p2,dc) and ((p1,worsejump) SC = 51).