That's a good question. I haven't configured a parameter using Data type but I took a look. It appears that when Data type - Integer is chosen, the only value(s) that can be entered for this type of parameter (using data-type -> Intger) are whole numbers. I do not believe Attack Signatures are checked against this type of parameter with the Data Type -> Integer selected.
My best guess is that there are no attack signature patterns that consist of strictly and only whole numbers.
My reference is ASM Configuration Guide 10.2. (Start on page 10 - 14 Configuring parameter characteristics for user-input parameters.....Integer is on page 10 - 18)
https://support.f5.com/content/kb/en-us/products/big-ip_asm/manuals/product/config_guide_asm_10_2_0/_jcr_content/pdfAttach/download/file.res/asm_config_guide_10_2.pdf
----Hope this helps----
Nimbostratus
