Clarification of Semantic wiki

Hi ,

Im very interested to learn and explore Semantic wiki. To begin with i
have some basic question s in my mind.
Can someone clarify on these aspects of semantic wiki?

1. What should be the basis for identifying semantics?

a. I was trying to experiment by semantifying a handful of
documents. I observed that the number of relations keep growing as was
try to semantify more documents.

b. Moreover there are no clear guidelines to identify the
relation. Its left to the user/ expert discretion

2. In which context an inverse relation can be useful & how it
should be used (with example)?

3. What should be the paramters which can be considered to link
the documents semantically?

4. Is there any way through which I can link two or more
relations

5. If I want to semantify an existing knowledge base, I
understand that the language of all the documents should be
streamlined uniformly(by eliminating synonymous usage of various terms
(ex:-like friend, buddy, pal, well wisher etc..is streamlined to
friend). But if I do this my query will get affected, as I have to
search based on the keyword. Only. Pls let me know if you have any
better suggestion here?

Thanks in advance,