Filtering a tier (Tier > Filter Tier…) works in a very
similar way as the previously described tokenizer. The main difference is that filtering
is meant for transfer of annotation information between tiers that are symbolic
associations.
A step-by-step approach to filtering:
- Select a source tier (from which the information will be copied)
- Choose a destination tier. If necessary create a new tier (with the
Create new tier… button)
- Optionally specify a filter. If a filter expression is found, it will be
removed from the destination annotation. Without any filter, the complete source
tier is copied to the destination tier.
- If the destination tier already contains annotation units, choose between
overwriting or preserving them. If its still empty you can ignore this
option.
- Select Create destination annotation for empty source
annotation if you want to create for every source annotation a
destination annotation, even if its empty.
- Click on Start to begin the filter operation or Close to go back to ELAN’s
main screen.
Figure 2.101. Filter tier
As easy as you can change the parent of a tier, it also is possible to copy the
complete content of a tier. This option differs in that it does not put any constraints
on the designated parent tier and it leaves you the choice whether you want to copy
the
tiers children.
This process can be started via the Tier > Copy tier
menu. Follow the steps below:
- Choose a tier to copy. If you also want to create a copy its dependent tiers,
check the Copy dependent tiers as well box.
- Specify the parent tier for the copy. To make it independent, select
Transcription (no parent)
- By default, the tier type will be kept. If you want to change it, select
another one from the dialog window and click on
Finish.
- Now the tier (and optionally its children) will be copied. “-cp” will be added
to the names in order to prevent confusion with the original tier. It is also
possible to check the option to rename the original tiers, so that the copies can
use the original names. This way, "-orig" will be added to the original
tier(s).
Note that this is similar to the change parent tier functionality (see Changing the parent of a tier). However it differs in 2 aspects:
- It is not mandatory to copy the child tiers.
- The parent for the copy can any be a tier in the transcription, including the
tier itself.