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Update tag-pruning.md 

Added link to Go's time parser function
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@ -21,7 +21,7 @@ Tag pruning is the process of cleaning up unnecessary or unwanted repository tag
## Specify a tag pruning policy ## Specify a tag pruning policy
You can now add tag pruning policies on each repository that you manage. To get started, navigate to `https://<dtr-url>` and log in with your credentials. As a repository administrator, you can now add tag pruning policies on each repository that you manage. To get started, navigate to `https://<dtr-url>` and log in with your credentials.
Select **Repositories** on the left navigation pane, and then click on the name of the repository Select **Repositories** on the left navigation pane, and then click on the name of the repository
that you want to update. Note that you will have to click on the repository name following that you want to update. Note that you will have to click on the repository name following
@ -38,28 +38,28 @@ DTR allows you to set your pruning triggers based on the following image attribu
| Name | Description | Example | | Name | Description | Example |
|:----------------|:---------------------------------------------------| :----------------| |:----------------|:---------------------------------------------------| :----------------|
| Tag name | Whether the tag name equals, starts with, ends with, contains, is one of, or is not one of your specified string values | tag name = `test`| | Tag name | Whether the tag name equals, starts with, ends with, contains, is one of, or is not one of your specified string values | Tag name = `test`|
| Component name | Whether the image has a given component and the component name equals, starts with, ends with, contains, is one of, or is not one of your specified string values | component name starts with `b` | | Component name | Whether the image has a given component and the component name equals, starts with, ends with, contains, is one of, or is not one of your specified string values | Component name starts with `b` |
| Vulnerabilities | Whether the image has vulnerabilities &ndash; critical, major, minor, or all &ndash; and your selected vulnerability filter is greater than or equals, greater than, equals, not equals, less than or equals, or less than your specified number | critical vulnerabilities = `3` | | Vulnerabilities | Whether the image has vulnerabilities &ndash; critical, major, minor, or all &ndash; and your selected vulnerability filter is greater than or equals, greater than, equals, not equals, less than or equals, or less than your specified number | Critical vulnerabilities = `3` |
| License | Whether the image uses an intellectual property license and is one of or not one of your specified words | license = `docker` | | License | Whether the image uses an intellectual property license and is one of or not one of your specified words | License name = `docker` |
| Last updated at | Whether the last image update was before your specified number of hours, days, weeks, or months | custom cron job = `1 1 1 1` or hours = `12` | | Last updated at | Whether the last image update was before your specified number of hours, days, weeks, or months. For details on valid time units, see [Go's ParseDuration function](https://golang.org/pkg/time/#ParseDuration). | Last updated at: Hours = `12` |
Specify one or more image attributes to your pruning criteria, and choose **Prune future tags** or **Prune all tags**. Upon selection, you will see a confirmation message and will be redirected to your newly updated **Pruning** tab. Specify one or more image attributes to your pruning criteria, and choose **Prune future tags** or **Prune all tags**. Upon selection, you will see a confirmation message and will be redirected to your newly updated **Pruning** tab.
![](../../images/tag-pruning-2.png){: .with-border} ![](../../images/tag-pruning-2.png){: .with-border}
If you have specified multiple pruning policies on the repository, the **Pruning** tab will display a list of your prune triggers and details on when a tag pruning operation was performed based on the trigger, a toggle for deactivating or reactivating the trigger, and a **View** link for modifying or deleting your selected trigger. If you have specified multiple pruning policies on the repository, the **Pruning** tab will display a list of your prune triggers and details on when the last tag pruning was performed based on the trigger, a toggle for deactivating or reactivating the trigger, and a **View** link for modifying or deleting your selected trigger.
![](../../images/tag-pruning-3.png){: .with-border} ![](../../images/tag-pruning-3.png){: .with-border}
All tag pruning policies on your account are evaluated every 15 minutes. Any qualifying tags are then deleted from the metadata store. If a tag pruning policy is modified or created, then the tag pruning policy for the *affected* repository will be evaluated. All tag pruning policies on your account are evaluated every 15 minutes. Any qualifying tags are then deleted from the metadata store. If a tag pruning policy is modified or created, then the tag pruning policy for the *affected* repository will be evaluated.
This does not cover modification or deletion of pruning policies. This does not cover modifying or deleting a tag pruning policy.
## Set a tag limit ## Set a tag limit
In addition to pruning policies, you can also set repository tag limits to restrict the number of tags on a given repository. Repository tag limits are processed in a first in first out (FIFO) manner. For example, if you set a tag limit of 2, adding a third tag would push out the first. In addition to pruning policies, you can also set tag limits on repositories that you manage to restrict the number of tags on a given repository. Repository tag limits are processed in a first in first out (FIFO) manner. For example, if you set a tag limit of 2, adding a third tag would push out the first.
![](../../images/tag-pruning-4.png){: .with-border} ![](../../images/tag-pruning-4.png){: .with-border}