First 8 bits are the number of top-level location steps. First 8 bits are the number of top-level location steps. Bit is on if any of the walkers contain a following step. If any of these bits are on, the expression may likely traverse outside the given subtree. This is really only useful if the count is 1.
Bit is on if the expression is a match pattern.
The exact type of iterator returned is based on an analysis of the XPath operations. The position of the operation code for this itterator. Copyright 2000 Apache XML Project. All Rights Reserved.