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This page presents user-supplied information, hence may be inaccurate in some details, or not necessarily reflect use patterns anticipated by the [incr tsdb()] developers. This page was initiated by FrancisBond; please feel free to make additions or corrections as you see fit. However, before revising this page, one should be reasonably confident of the information given being correct.

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Updating

One of the defining properties of the Redwoods treebanks is that they are dynamic: the treebank can be updated when the grammar changes.

Because the discriminants are saved for each parse forest, even when the grammar changes, re-annotation is only necessary in cases where either the parse has become more ambiguous, so new decisions have to be made, or changes in rules or lexical items have made the parse so different that the earlier discriminants are not applicable.

Updating is a two step process: Fully Automatic (which will annotate all trees that are uniquely determined) and Interactive (which will present the annotator with any new decisions that need to be made).

Fully Automatic Update

Select the gold standard profile (middle button; if you don’t have a middle button, click on Compare–Source Database to choose the gold profile) something.n
Select the target profile (Left button) something/grammar
Load the same grammar as the target profile (rsa ”japanese”)
Set Trees | Switches | Automatic Update, and nothing else.
Select Trees | Update
Wait for a tree annotation window to pop up …
The updates are color coded:
- Magenta: A single correct parse was found
- Blue: There was only one parse but it was not one that was determined by the gold annotations
- Black: There are still remaining ambiguities

You do your annotation on Run 1 of some test suite TS with version A of the grammar. Then change the grammar to produce version B. Create a new instance of the test suite TS for Run 2, and Process | All Items

using grammar version B. Next, select Run 1 as your gold

standard (middle click), select Run 2 as the current database (left click), make sure version B of the grammar is loaded into the LKB, make sure that Trees | Switches | Automatic Update is selected, and then select Trees | Update. This will cause the tree annotation window to appear, and begin zooming through your items, incorporating all annotations that it can from the original treebank in Run 1, and adding those annotations to Run 2.

This will give all the sentences that satisfy the update-match-p() predicate (defined in lkb/src/tsdb/lisp/redwoods.lisp). The default is inputs for which the recorded discriminants fully disambiguate, where there is more than one reading, or those where there is only one reading, and it is the same as before.

  ;; during updates, a `save' match is indicated by the following conditions:
  ;;
  ;;   - the current item has not been tree annotated already;
  ;;   - the number of active trees in the current set equals the number of
  ;;     active trees in the gold set;
  ;;   - either the current item has more than one reading, or that single one
  ;;     reading has the exact same derivation as the preferred tree from the
  ;;     gold set.
  ;;   - also, when in `exact-match' update mode, be content if there is one
  ;;     unique result.
  ;;

Note that has not been tree annotated does not mean the same as unannotated. The former means has not been touched before (e.g. there is no entry in the tree file) the latter means that it has been touched (e.g. there is an entry in the tree file with the value -1).

Interactive Update

Treebank only those places that have changed

Select the gold standard profile (middle button) something.n
Select the target profile (Left button) something/grammar
Load the same grammar as the target profile (rsa ”japanese”)
Unset Trees | Switches | Automatic Update
Set Options | TSQL Condition | Unannotated
Select Trees | Update

In this stage, the annotator can annotate any trees that have changed, exploiting any relevant existing decisions.

Last update: 2014-04-08 by FrancisBond [edit]