Database Reference
In-Depth Information
awake
, referring to the same person. Instead of representing this change by
revising the first proposition into the second,
9
the second proposition is added
as new content, like sediment, leaving the first proposition unaltered:
4.4.2 C
OREFERENTIAL COORDINATION IN A
W
ORD
B
ANK
⎡
⎣
⎤
⎦
...
⎡
⎣
⎤
⎦
...
core: Julia
noun: Julia
fnc: sleep
prn: 675
noun: (Julia 675)
fnc: wake
prn: 702
...
...
⎡
⎣
⎤
⎦
verb: wake
arg: (Julia 675)
prn: 702
...
core: wake
...
...
...
⎡
⎤
verb: sleep
arg: Julia
prn: 675
...
core: sleep
⎣
⎦
...
...
The core attribute of the
Julia
proplet with the
prn
value
702
has the address
value
[noun: (Julia 675)]
, instead of a regular core value, e.g.,
[noun: Julia]
.
10
This method, called coreference-by-address, enables a given item to code
as many relations to other proplets as needed, without increasing the number
of attributes or values within proplets. For example, the proplets in the token
line of
Julia
in 4.4.2 have the
fnc
value
sleep
in proposition 675, but
wake
in
proposition 702. The most recent (and thus most up-to-date) content relating
to the original proplet is found by searching the relevant token line from right
to left, i.e., in the anti-temporal direction.
Coreference-by-address establishes a relation between the core values of two
proplets,
11
in contradistinction to functor-argument and coordination, which
establish a relation between the core value of one proplet and the continua-
tion value of another. In other words, coreference-by-address relates proplets
within the same token line, while functor-argument and coordination relate
proplets across different token lines.
Defining core values as addresses does not affect the strictly time-linear or-
der of storing proplets in a token line (4.4.2), yet allows us to refer back to a
coreferent proplet within that token line. As a result, coreference-by-address
provides for a third kind of LA-think navigation - in addition to moving along
9
A more application-oriented example would be
fuel level high
at t
i
and
fuel level low
at t
j
.
10
In the JSLIM implementation of this particular use of an address, the relation is realized not only by a
pointer to the original
Julia
proplet with the
prn
value
675
, but also by a second, bidirectional pointer
(not shown) which connects the current proplet to its immediate coreferential predecessor, resulting
in an incremental chain to the original, assuming that there are several coreferent address proplets.
11
In contrast to coreferential pronouns in natural language, computational coreference-by-address is
not limited to nouns. For example, in the sequence
Fido barked. ... When Fido barked.
, the second
barked
may be represented as coreferent with the first.
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