有谁知道这是什么格式资料

收到客户的资料，开头部分如下：

product_number = "TVJ60405";
file_name = "net.enf";
unit = "mil";
x_offset = "700.00";
y_offset = "700.00";
rotation = "0";
net {
name = "3V_SUP-B";
pin {
name = "C01";
item_number = "X7602";
x = "16103.54";
y = "5385.04";
layer = "all";
}

请问这是什么格式，什么资料?

没见过,好象是设计的网络原理图吧,