2.8 Example: finding “nearby” words

• insert optional matchall patterns between words

  > "right" []? "left";

• repeated matchall for longer distances

  > "no" "sooner" []* "than";

• use the range operator {,} to restrict number of intervening tokens

  > "as" []{1,3} "as";

• avoid crossing sentence boundaries by adding within s to the query

  > "no" "sooner" []* "than" within s;

• order-independent search

  > "left" "to" "right"
| "right" "to" "left";