List the various categories of highlighters.

Different categories of highlighters available in Apache Solr include the following:

• Standard Highlighter: gives exact matches even to innovative query parsers.
• FastVector Highlighter: Though less progressed in comparison to Standard Highlighter, it works better for more dialects and promotes Unicode break iterators.
• Postings Highlighter: One of the most precise, compact and effective highlighter categories in comparison to other vectors. However, inappropriate for a progressive number of question terms.