@JonathanB9941

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ElasticSearch Highlighting Capability

ElasticSearch does indeed have a built-in highlighting feature that allows for emphasizing search terms in results. This is typically implemented using the highlight parameter in ElasticSearch queries, which extracts matching query terms from documents and surrounds them with HTML tags or other delimiters.

Pega and ElasticSearch Integration

While Pega integrates with ElasticSearch for search functionality across various applications (including Pega 8.8+, Pega 23, and Pega 24), the standard implementation doesn't expose the highlighting parameter directly through configuration options. The search functionality in Pega can be customized to some extent, but there's no simple "check this box" solution for enabling search term highlighting that I could find in the documentation.

Potential Approaches

Based on my research, here are some potential approaches you might consider:

1. Custom Search Activity: The pxRetrieveSearchData activity is used by search gadgets in Pega to query the database. You might be able to customize this activity to include the highlight parameter in the ElasticSearch query. This would require modifying the search API calls to include the highlighting parameters.
2. Custom UI Rendering: Even if you can get ElasticSearch to return highlighted results, you'll need to ensure that Constellation can properly render the HTML tags or delimiters used for highlighting. This might require custom UI components or modifications to existing components.
3. Client-Side Highlighting: As an alternative, you could implement client-side highlighting using JavaScript after the search results are returned. This approach wouldn't require modifications to the ElasticSearch queries but would add processing on the client side.
4. SRS Configuration: If you're using the Pega Search and Reporting Service (SRS), there might be configuration options at that level to enable highlighting, though this isn't explicitly documented.

Next Steps

Since this appears to be a specialized customization, I would recommend:

1. Consulting with Pega Support to see if they have any specific guidance or examples of implementing search term highlighting with ElasticSearch.
2. Exploring the Pega search API in more detail to understand how the ElasticSearch queries are constructed and where you might be able to inject the highlight parameter.
3. Investigating whether there are any community contributions or examples of implementing similar functionality.

References:

• Using full-text search based in Elasticsearch
• Pega search API
• Configuring Search
• Elasticsearch Highlighting Documentation