What date/time format are the .cct collections files saved in?

I am trying to integrate the opus collections systems into other process and workflows. I have figured out most of what I need, accept for the attr,access, create, modify, reserved and size node attributes:

...
	<item access="+1db1742+6944ffd7" attr="32" create="+1d94071+b09a93db" modify="+1db1742+6116c1b5" reserved0="0xa000000c" size="225">C:\temp\file1.txt</item>
	<item access="+1db1742+69451e3c" attr="32" create="+1db0533+698ee29" modify="+1db1742+61170fcc" reserved0="0xa000000c" size="228">C:\temp\file2.png</item>
...

Can developers please chime in on what each attribute denote to?
Lastly, what date/time format doe the strings +1db0533+698ee29 use?

I am working with .net so I am confident in decoding them on my end but I have yet to Identify them. I am aware of DopusRT, ideally I would like to just remain within .net and work with the existing collections files, rather calling DopusRT to generate an Xml file.

I asked chatGPT and its not sure:
The string "+1daeaa2+503bca64" does not immediately correspond to a standard or recognizable data type like a date or timestamp. Based on its structure, it appears to be:

  1. Hexadecimal values: The string seems to contain two segments, 1daeaa2 and 503bca64, which are both valid hexadecimal numbers (composed of digits 0-9 and letters a-f).

  2. Custom encoding or identifier: It could be part of a custom encoding or identifier system, possibly used for things like:

    • Unique session or user IDs.
    • Data hashes or checksums.
    • A string for cryptographic purposes.

Why it's not a date:

  • It doesn’t follow the typical format for a date string, such as YYYY-MM-DD, MM/DD/YYYY, or ISO 8601 formats (YYYY-MM-DDTHH:MM:SSZ).
  • There are no obvious date/time-related components (like numbers representing year, month, or time).

If you were expecting this to represent a date, you might need additional context (e.g., how this string is generated or where it's coming from).

I'm not by the source code right now but it's probably using the Windows FILETIME format: