Tag expressions
to be used to find wikiwords that have a combination of tags (see TagMetaphor) as supplied by a expression
tag operations
| operation | symbol |
| AND | + |
| OR | | |
| NOT | - |
examples:
| tag1+tag2-tag3 | show all pages with tag1 AND tag2 but NOT with tag3 |
| tag1|tag2 | show all pages with tag1 OR tag2 |
| (tag1|tag2)+tag3 | show all pages with both tag1 OR tag2 , and additionally with tag3 |
| (tag1|(tag2+tag3) | show all pages with tag1 OR the combination of tag2 AND tag3 |
| -tag1 | show all pages NOT with tag1 |
