To automate the process of graph generation using shell scripts, I recommend using the 'here' document method, as this process can be used to generate graphs using gnuplot on the fly.
要想使用shell脚本自动执行图形生成，我建议使用' here '文档方法，可以通过这个过程使用gnuplot动态地生成图形。
2
In addition, one simple IBMIDDoc documentshell, with no real content other than a DITA pointer, can be used to get to any output format already supported by the IBMIDDoc toolset.
In Listing 9 we create a captive TAB character using command substitution and then create a very small shell script containing two cat commands, which each read from a here-document.