auto numbering for all the nodes and sub nodes of tree in SQL - sql

Question

I want to have numbering and sub-numbering to tree using a SQL query.
I have tried multiple ways, I am new to SQL.
WITH tree AS
(
SELECT
c1.structureid, c1.parentid, c1.Text,
[level] = 1,
path = CAST(c1.structureid AS VARCHAR(100)),
pathindex = 0, numericalMapping = '0.0'
FROM
[ast].[Structure] c1
WHERE
c1.parentid IS NULL
UNION ALL
SELECT
c2.structureid, c2.parentid, c2.Text,
[level] = tree.[level] + 1,
Path = CAST(tree.path + '/' + RIGHT('000000000' + CAST(c2.structureid AS VARCHAR(10)), 10) AS VARCHAR(100)),
pathindex = 0, numericalMapping = '0.0'
FROM
[ast].[Structure] c2
INNER JOIN
tree ON tree.structureid = c2.parentid
)
SELECT
tree.level, tree.path, tree.parentid,
REPLICATE(' ', tree.level - 1) + tree.Text AS description,
C.* ,
RANK() OVER (PARTITION BY tree.parentId ORDER BY tree.parentId) AS indx
FROM
tree
INNER JOIN
[ast].[Value] AS C ON tree.structureid = C.structureid
ORDER BY
InstanceId, path
input Tables:
table 1
ValueId InstanceId StructureId ChoiceId Score
622 205 580 30 3
623 205 581 30 3
624 205 582 30 3
625 205 583 NULL NULL
626 205 584 NULL NULL
627 205 585 NULL NULL
628 205 586 NULL 5
629 205 587 NULL 5
630 205 588 NULL 5
631 205 589 40 4
632 205 590 NULL NULL
633 205 591 NULL NULL
table 2
StructureId AssessmentId ParentId Required Sequence Text Objective
580 127 NULL 1 0 Customer Satisfaction NULL
581 127 580 1 1 Top Customers NULL
582 127 580 1 1 Customer Feedback Process NULL
583 127 NULL 1 0 Continuous Improvement NULL
584 127 583 1 0 Gemba NULL
585 127 583 1 0 Real-Time Status NULL
586 127 583 -1 -1 TPM NULL
587 127 586 -1 0 Cleaning and Inspection NULL
588 127 586 1 1 Eliminate Contamination NULL
589 127 588 1 0 Test NULL
590 127 NULL 0 0 SAP Mii NULL
591 127 590 0 0 Dispatch Reports NULL
enter image description here
table 1
enter image description here
table 2
Note:
I want to have one more column which will tell the index of each record.
example : 1,2,3
if there are children in 1 then 1.01, 1.02 and so on