The PSTricks macros cannot be used (directly) with pdfTeX, since PSTricks uses
PostScript arithmetic, which isn't part of PDF. This package circumvents this
limitation so that the extensive facilities offered by the powerful PSTricks
package can be made use of in a pdfTeX document. This is done using the shell
escape function available in current TeX implementations. The package may also
be used in support of other 'PostScript-output-only' packages, such as PSfrag.
For alternatives, users may care to review the discussion in the PSTricks
online documentation.
