Creation of a Structure of Cells - MATLAB - excel

Question

I have a set of data as can be seen from the attached snapshot. As can be observed, it is a set of repetitive data. I am trying to write a code such that the code would create a main structure "RoadXML" with all the subsequent text in the cell as structure elements.
For eg: " RoadXML.Network.SubNetworks.SubNetwork.RoadNetwork.Grounds.Ground" should produce a structure RoadXML which has a struct element "Networks" which inturn is a structure. Likewise " Networks" should have " Subnetworks" as an element which is a structure and so on... Furthurmore, the rest of the data should append itself to the main structure under its respective fields. Hence in the end only one structure would remain with all the data in the excel sheet as its structure elements.
Now the problem is that, when repetitive sets of elements are present in the excel sheet as can be seen from the screenshot, only the last set of data remains thus overwriting the data that has been already stored. That is to say (with reference to the attached screenshot) data from rows 30 to 34 over writes all the data from rows 15 to 29 that has been alreaady stored.
UPDATE
To be a bit more clear about my problem, during the iteration from row 15 to 19, my code stores the data from the first column as structures in the exact format as shown in the snap. i.e. RoadXML is a structure which has Network which in turn is a structure which has SubNetworks which inturn is a structure which has SubNetwork and so on till the last parameter. In the end, we'll have Ground as a structure inside Grounds.
Since A15 and A20 are the same data, once row 20 is encountered the code should convert Ground which was earlier a structure into a cell, create a 1x1 structure in the cell which has ''Attributes''(structure) in it as a field. Once ''Attribute'' has been created, ''granulosity'', ''grip''; ''name'' and ''type'' should be appended into ''Attributes'' with their corresponding values from column B.

Answer 1

For every new line in the excel file:
Check if part of the new field path already exists.
For example, after line 2 "RoadXML.Network.SubNetworks.SubNetwork.RoadNetwork.Grounds.Ground.Attributes.granulosity" is created.
On line 3, the path till "Attributes" already exists. Only the field "grip" is missing.
Read here about checking if a certain field exists in a nested structure.
If part of path exists, start add fields where the existing path ends.
If the full path, including the last field exists, choose what you want it to do. Overwrite? Make that field a vetor?
Example run:
Line 15: Ground doesn't exists, so created:
RoadXML....Ground{1,1}.Text=""
Lines 16-19: Ground exists, add the attributes
RoadXML....Ground{1,1}.Attributes.X=Y
Line 20: Ground contains 1 cell, so add a new one:
RoadXML....Ground{1,2}.Text=""
And so on..