(SOLVED) .~lock. items appearing in Documents folder

What are these .~lock. items, which have been appearing in my documents folder and why are they appearing?

I have been deleting them, as I never saw them in Zorin 9 and everything seems fine.

Something else to get on top of!

You're not running Visio under Wine are you?

Not to my knowledge - how could I tell?

It has been difficult to find info - all I could find is that .lock files are associated with Vizio?

I guess I will keep deleting them then!

For what it is worth they appear as an extra file associated (same name) with Open Office .odt and .doc files, I think.

I will save a file both as an .odt and .doc to confirm this.

Correction the .~lock file is associated with the files saved as a .doc and is 83 bytes

I must be getting better - I found my own solution!

1. "The lock file is created when a document is opened and normally deleted when the document is closed. It's purpose is in a multi user environment to prevent more than one user to edit a document, which would create a problem. The first user to open the file will be able to edit the document but any subsequent users who open the document will be in read only mode."

2. "The lock file is left over after an OpenOffice file is closed in some irregular fashion, as for example by a program or system crash. Its purpose is to prevent two users trying to edit the file at the same time, so if a lock file exists subsequent users see the file as "read-only". With OpenOffice closed, any remaining lock files should be deleted."

They have probably appeared when I have run out of lid closed battery and Open Office was left running before the lid was closed - it is the same arrangement in Libre Office apparently.

I see a lock file briefly during saving into documents but nothing is showing up after deletion using LibreOffice!