15 lines
935 B
Markdown
15 lines
935 B
Markdown
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# Lexicon
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The lexicon contains a mapping for words to identifiers. This lexicon is populated from a journal.
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The actual word data isn't mapped, but rather a 64 bit hash.
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The lexicon is written by [crawl/loading-process](../../crawl/loading-process) and read when
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[services-core/index-service](../../services-core/index-service) interprets queries.
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## Central Classes
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* [KeywordLexicon](src/main/java/nu/marginalia/lexicon/KeywordLexicon.java)
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* [KeywordLexiconJournal](src/main/java/nu/marginalia/lexicon/journal/KeywordLexiconJournal.java)
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* [DictionaryMap](src/main/java/nu/marginalia/dict/DictionaryMap.java) comes in two versions
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* * [OnHeapDictionaryMap](src/main/java/nu/marginalia/dict/OnHeapDictionaryMap.java) - basically just a fastutil Long2IntOpenHashMap
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* * [OffHeapDictionaryHashMap](src/main/java/nu/marginalia/dict/OffHeapDictionaryHashMap.java) - a heavily modified trove TLongIntHashMap that uses off heap memory
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