# description
How a search parameter relates to the set of elements returned by evaluating its xpath query.

# concept[].definition
The search parameter is derived directly from the selected nodes based on the type definitions.

# concept[].definition
The search parameter is derived by a phonetic transform from the selected nodes.

# concept[].definition
The search parameter is based on a spatial transform of the selected nodes.

# concept[].definition
The search parameter is based on a spatial transform of the selected nodes, using physical distance from the middle.

# concept[].definition
The interpretation of the xpath statement is unknown (and can't be automated).