*:* will retrieve all indexed documents

Short words (less than three characters) are ignored.

Searches are case-insensitive, e.g. canada will find Canada. Canadian, ...

Stemmed searches are enabled: e.g. "Canad*" will find "Canada", "Canadian", ...

Among the metadata fields captured is "title" (i.e., document titles). Thus, to to find indexed documents containing Canada in the title, search for: title:canada.

Likewise, to find documents with

With the current (2023-05-10) documents indexed, title:"supreme court" and title:"supreme" AND title:"court" will give the same results,

Add:

• The Extended DisMax (eDismax) Query Parser

In addition to supporting all the DisMax query parser parameters, Extended Dismax:

• supports Solr's standard query parser syntax such as (non-exhaustive list):
• boolean operators such as AND (+, &&), OR (||), NOT (-).
• optionally treats lowercase "and" and "or" as "AND" and "OR" in Lucene syntax mode
• optionally allows embedded queries using other query parsers or functions
• includes improved smart partial escaping in the case of syntax errors; fielded queries, +/-, and phrase queries are still supported in this mode.
• improves proximity boosting by using word shingles; you do not need the query to match all words in the document before proximity boosting is applied.
• includes advanced stopword handling: stopwords are not required in the mandatory part of the query but are still used in the proximity boosting part. If a query consists of all stopwords, such as "to be or not to be", then all words are required.
• includes improved boost function: in Extended DisMax, the boost function is a multiplier rather than an addend, improving your boost results; the additive boost functions of DisMax (bf and bq) are also supported.
• supports pure negative nested queries: queries such as +foo (-foo) will match all documents.
• lets you specify which fields the end user is allowed to query, and to disallow direct fielded searches.
• ...

---

• The Standard Query Parser
• A query to the standard query parser is broken up into terms and operators. There are two types of terms: single terms and phrases.
• A single term is a single word such as "test" or "hello"
• A phrase is a group of words surrounded by double quotes such as "hello dolly"
• Multiple terms can be combined together with Boolean operators to form more complex queries (as described below).
• ...

Help

Help - Searches

Searching in BT-Solr employs Apache Solr as the back-end (hidden) document indexer / document store.

While the default functionality on the (main tabs) "Search" page works intuitively and well, the following provide tips for more advanced searches.

Solr Leading Wildcard Queries

• E.g., *tion
• Not available; see (e.g.) this article.
• Update [2021-03-04; BT-Solr (ResultWidget) v.2,8] Both leading and trailing wildcard queries now working! E.g., "*alifa*" finds "Halifax", "Califano".

Help - NLP [Natural Language Processing]

Keywords

• Keywords are words or concepts associated with significant content, topics and categories. E.g.:
  • science;
  • business;
  • cats;
  • dogs;
  • weather;
  • vegetables;
  • newspapers;
  • songs;
  • videos;
  • ...

Nouns

• Nouns - nominally persons, places, things - are useful for categorizing and organizing collections of texts (corpora), and providing structure to relational graph databases (graphs → knowledge graphs).

Named Entities | Proper Names

• Victoria Stuart
• Canada
• Google