Read / write nodes in fileURL attribute values should like Date type and Numeric types of formatted string, and he can name to set document.
Such as document name filename_yyyy_MM_dd_HH_mm_ss_000.txt
output should
filename_2007_12_12_08_59_20_000.txt
filename_2007_12_12_08_59_20_001.txt and filename_2007_12_12_08_59_20_002.txt this the format
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eg. Node add attribute timeFormatString and
numberFormatString
<Node recordsPerFile=“10” fileURL=“filename” timeFormatString=“yyyy_MM_dd_HH_mm_ss” numberFormatString=“000” … />