Now that the system has all of the words from the example, we
can use the Dictionary test tool to graphically view the
linkages of the sentence. To access the tool, click the
Dictionary Table link from the main page. Then click
on the Test Grammar Strings link.
This will bring up a new window that allows the user to
interactivly enter words into the sentence and view the
current and outstanding links.
Upon bringing up the tool, the system automatically inserts
the LEFT-WALL word we added in step 2. We added the Grammar
String as AV+. The following picture displays that
the LEFT-WALL has an AV open link to the right.
Now we will add the first word of the example sentence
by entering john into the Enter Word field, then
pressing enter. The picture will be updated to represent
both the LEFT-WALL still has an open AV link, and now the
john word is looking for a subject.
Continuing entering all of the words of the example sentence
john has a dog. The following should be the linkages
found:
There are two linkages for the current sentence. The first,
the incorrect one, has dog looking for a subject to the right,
and the verb is still looking for its direct object. Since
we have completed entering in words, any sentences with hanging
open links will be discarded. So this linkage will not be
processed.
The second linkage correctly shows dog as the direct object
of the verb, and no open links. Therefore, the collection
of words entered is at least syntactically valid for the
grammar we have entered in the dictionary.
Note that the word has correctly used the Grammar String
for the root word have in the Dictionary.
The system syntactically interprets the sentence as:
The AV link from the LEFT-WALL says the verb is an action verb in
a regular SVO sentence (as opposed to a question, which would
have the verb first). The verb has a subject and a direct object.
John has an S link which puts it in the subject role. Dog
has a DO link for direct object. The D link is for an article.
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