Section 6.4 Import and Pseudo-Schema

It is the general style of the BPEL spec to include a pseudo-schema example
in each section along with the activity defined in that section. I noticed
that section 6.4 on import does not include such a pseudo-schema. This isn't
an error since the pseudo-schema is given in section 6.2 and the proper
definition in the normative schema but still, it's probably worth being
consistent.