Grouping XML data using Read File In Segments

Content

We have a requirement where we need to read a BIP report which is a XML file. Each record in the XML file represents  a header and a line information. We need to construct a payload reading records with all the lines which has a matching header information and call an API passing this payload. Our BIP reports is a zipped xml file stored in UCM and the unzipped file can get quite large.

My questions are

1, Can Read File In Segment be used on a XML file

2. If so, how can I be sure that I have all the lines with the matching header information in 200 chunk that gets read. A line with a matching header can also be part of the next 200 chunk. In this case I cannot use Read File In Segment. Please correct me if I am wrong.