The vault administrator controls
who has permission to delete documents on the Vault Settings
tab of VaultAdmin.You must own a document to delete it or roll back the revision.
When you delete a document from the PDMWorks Workgroup vault, it is placed in an Obsolete folder. When you roll back a document, revisions later than the specified revision are placed in the Obsolete folder.
You can choose to delete only the selected document, the document and its children, or only the children.
The vault administrator controls
who has permission to delete documents on the Vault Settings
tab of VaultAdmin.
You must own a document to delete it or roll back the revision.
To delete or roll back a document:
In the SolidWorks or SolidWorks Explorer client:
Select the document and press Delete.
Right-click the document and select Delete / Rollback.
For an efficient method of deleting documents, see Best Practices.
Select:
Delete from the vault, deleting all revisions. Select one or more:
Delete selected document.
Delete owned children (owned documents under selected). Select either First level children only or All children.
Do not delete if document is a link.
Do not delete if the document resides in another project and is referenced
by a link 
.
Rollback to a revision, deleting later revisions.
Latest revision (read only).
Rollback to revision. Select from the list.