Hi all: 

Now I want to do some operations like ‘update’ or ‘insert’, which can
describe like this:

1. I have a base dataset

2. Everyday I will get more data from other places, and then I want to
update or insert these new data into my base dataset. 

3. After I’ve read API Doc, I think MapFile is a good way to solve this
problem. As far as I know, I only need to append my new data at the end of
base dataset, and update the index file of MapFile. I understand right?

4.  If I am right, I want to know how to do these operations using MapFile. 

Firstly, I could only find MapFileOutputFormat and couldn’t find
MapFileInputFormat, so how to read the MapFile?

Secondly, how to update the index and append the data? Do you have some
experience or samples?

Any suggestion would be appreciated.

Thank you!

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