Input Requirements
SERXMLBC reads an XML request message at DD statement XMLIN. Requirements for input include:
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The input file is a sequential data set, PDS member, or PDSE member. 
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DCB requirements for file are flexible, but the following is suggested to accommodate long tags: RECFM=VB LRECL=255
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Request messages must be formatted with one tag per record. 
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Tag indenting is allowed (leading spaces are X’40’), but indenting is not required and no information is conveyed by indenting.