# Package org.modeshape.jcr.sequencer

- Class Summary
  Class | Description
  --- | ---
  PathExpression | An expression that defines an acceptable path using a regular-expression-like language.
  PathExpression.Matcher |
  PathExpression.WorkspacePath |
  SequencerPathExpression | An expression that defines a selection of some change in the repository that signals a sequencing operation should be run, and the location where the sequencing output should be placed.
  SequencerPathExpression.Matcher |

- Exception Summary
  Exception | Description
  --- | ---
  InvalidPathExpressionException | A runtime exception that represents that an invalid `path expression` was specified.
  InvalidSequencerPathExpression | A `repository exception` that denotes an invalid path expression for a sequencer.

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