[HOP-4045] (DOC) define HOP regular expressions

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Migrated to GHI
• Component/s: Documentation
• Assignee: Hans Van Akelyen
• Reporter: Vladimir Alexiev
• Created: 06/Jul/22 13:00
• Updated: 15/Feb/23 10:46
• Resolved: 15/Feb/23 10:46

Description

https://hop.apache.org/manual/next/pipeline/transforms/textfileinput.html

• "Selecting files using Regular Expressions" gives examples of some unusual regex constructs. Please link to a definition of these regexes

  # maybe .*userdata.*\.txt is meant?
  .userdata.\.txt  
  # what is ENG? and are there other digits but ENG? And how does this relate to Unicode char classes?
  [ENG:A-Z][ENG:0-9].*  
  

• specify whether regexes are anchored (as if surrounded by ^...$) or partial-match
• define subheadings (anchors) for "Selecting files using Regular Expressions" and "Accepting filenames from a previous transform"