Filtering a 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
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 it’s still empty you can ignore this option.
Select
if you want to create for every source annotation a destination annotation, even if it’s empty.Click on Start to begin the filter operation or Close to go back to ELAN’s main screen.
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 tier’s children.
This process can be started via the
menu. Follow the steps below:Choose a tier to copy. If you also want to create a copy its dependent tiers, check the
box.Specify the parent tier for the copy. To make it independent, select
By default, the linguistic type will be kept. If you want to change it, select another one from the dialog window and click on
.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.
Note that this is similar to the change parent tier functionality (see the section called “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.