{"id":9102,"date":"2020-08-10T16:24:52","date_gmt":"2020-08-10T23:24:52","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=9102"},"modified":"2025-06-13T21:20:28","modified_gmt":"2025-06-14T04:20:28","slug":"full-text_search_text_analysis","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/full-text_search_text_analysis\/","title":{"rendered":"An\u00e1lise de texto em um mecanismo de pesquisa de texto completo"},"content":{"rendered":"<p class=\"p4\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-9127\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-5.25.41-PM.png\" alt=\"\" width=\"1100\" height=\"701\" \/>A pesquisa de texto completo refere-se a t\u00e9cnicas de pesquisa de conte\u00fado de texto em um documento ou em uma cole\u00e7\u00e3o de documentos que cont\u00eam conte\u00fado textual. Um mecanismo de pesquisa de texto completo examina todo o conte\u00fado textual dos documentos ao tentar corresponder a um \u00fanico termo de pesquisa ou a v\u00e1rios termos, sendo a an\u00e1lise de texto um componente essencial.<\/p>\n<p class=\"p4\">Voc\u00ea provavelmente j\u00e1 ouviu falar do mais conhecido mecanismo de pesquisa de texto completo: <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Apache_Lucene\"><span class=\"s1\">Lucene<\/span><\/a><\/strong> com <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Elasticsearch\"><span class=\"s1\">Elasticsearch<\/span><\/a><\/strong> constru\u00eddo sobre ele. O <span class=\"s1\">Pesquisa de texto completo (<strong>FTS<\/strong>) Motor<\/span> \u00e9 alimentado por <strong><a href=\"https:\/\/github.com\/blevesearch\/bleve\"><span class=\"s1\">Bleve<\/span><\/a><\/strong>e este artigo mostrar\u00e1 <strong>as v\u00e1rias maneiras de analisar textos<\/strong>\u00a0dentro desse mecanismo.<\/p>\n<p class=\"p4\">O Bleve \u00e9 uma biblioteca de indexa\u00e7\u00e3o e pesquisa de texto de c\u00f3digo aberto implementada em Go, desenvolvida internamente no Couchbase.<\/p>\n<p class=\"p4\">O mecanismo FTS do Couchbase oferece suporte a \u00edndices que se inscrevem em dados que residem em um <span class=\"s1\"><b>Servidor Couchbase<\/b><\/span> e indexa os dados que ingere do servidor. \u00c9 um sistema distribu\u00eddo, o que significa que pode particionar dados em v\u00e1rios n\u00f3s de um cluster e as pesquisas envolvem a dispers\u00e3o da solicita\u00e7\u00e3o e a coleta de respostas de todos os n\u00f3s do cluster antes de responder ao aplicativo.<\/p>\n<p class=\"p4\">O mecanismo do FTS distribui os documentos ingeridos para um \u00edndice em um n\u00famero configur\u00e1vel de parti\u00e7\u00f5es, e essas parti\u00e7\u00f5es podem residir em v\u00e1rios n\u00f3s de um cluster. Cada parti\u00e7\u00e3o segue o mesmo conjunto de regras com as quais o \u00edndice FTS est\u00e1 configurado, para analisar e indexar o texto no banco de dados de pesquisa de texto completo.<\/p>\n<p class=\"p4\">O <b>an\u00e1lise de texto<\/b> O componente de um mecanismo de pesquisa de texto completo \u00e9 respons\u00e1vel por dividir o texto bruto em uma lista de palavras, que chamaremos de tokens. Esses tokens s\u00e3o mais adequados para indexa\u00e7\u00e3o no banco de dados e para pesquisa.<\/p>\n<p class=\"p4\">O mecanismo FTS do Couchbase lida com a indexa\u00e7\u00e3o de texto para documentos JSON. Ele cria um \u00edndice para o conte\u00fado que \u00e9 analisado e armazena no banco de dados - o \u00edndice junto com todos os metadados relevantes necess\u00e1rios para vincular os tokens gerados aos documentos originais nos quais eles residem.<\/p>\n<p class=\"p1\">Um <strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Inverted_index\"><span class=\"s1\">\u00cdndice invertido<\/span><\/a><\/strong> \u00e9 a estrutura de dados escolhida para indexar os tokens gerados a partir do texto, para tornar as consultas de pesquisa mais r\u00e1pidas. Esse \u00edndice vincula todos os tokens gerados aos documentos que cont\u00eam o token.<\/p>\n<p class=\"p1\">Por exemplo, veja os seguintes documentos...<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-9129\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-6.05.12-PM.png\" alt=\"\" width=\"770\" height=\"120\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-6.05.12-PM.png 770w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-6.05.12-PM-300x47.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-6.05.12-PM-768x120.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-6.05.12-PM-20x3.png 20w\" sizes=\"auto, (max-width: 770px) 100vw, 770px\" \/><\/p>\n<p class=\"p1\">O \u00edndice invertido para os tokens gerados a partir dos 2 documentos acima seria semelhante a este.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9110\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.23.03-PM.png\" alt=\"Inverted Index Example\" width=\"355\" height=\"339\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.23.03-PM.png 417w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.23.03-PM-300x286.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.23.03-PM-20x20.png 20w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><\/p>\n<p class=\"p1\">Aqui est\u00e1 um diagrama que destaca os componentes do mecanismo de pesquisa de texto completo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9124\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.40.16-PM.png\" alt=\"Couchbase Full-Text Search Engine\" width=\"987\" height=\"370\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.40.16-PM.png 1022w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.40.16-PM-300x112.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.40.16-PM-768x288.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.40.16-PM-20x7.png 20w\" sizes=\"auto, (max-width: 987px) 100vw, 987px\" \/><\/p>\n<h3 class=\"p1\"><b>Um analisador de texto<\/b><\/h3>\n<p class=\"p3\">Os componentes de um analisador de texto podem ser classificados em duas categorias:<\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li>Tokenizador<\/li>\n<li>Filtros<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>O mecanismo do Couchbase categoriza ainda mais os filtros em:<\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li>Filtros de caracteres<\/li>\n<li>Filtros de token<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Antes de nos aprofundarmos na fun\u00e7\u00e3o de cada um desses componentes, apresentamos a seguir uma vis\u00e3o geral de um analisador de texto.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9117\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM.png\" alt=\"Text Analyzer\" width=\"954\" height=\"352\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM.png 1030w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM-300x111.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM-1024x378.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM-768x283.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.28.32-PM-20x7.png 20w\" sizes=\"auto, (max-width: 954px) 100vw, 954px\" \/><\/p>\n<h4 class=\"p1\"><b>Tokenizador<\/b><\/h4>\n<p class=\"p3\">Um tokenizador \u00e9 o primeiro componente ao qual os documentos s\u00e3o submetidos. Como o nome sugere, ele divide o texto bruto em uma lista de tokens. Essa convers\u00e3o depender\u00e1 de um conjunto de regras definido para o tokenizador.<\/p>\n<p class=\"p3\">Tokenizadores de a\u00e7\u00f5es ...<\/p>\n<p class=\"p3\">Veja este texto de amostra como exemplo: \"<i>Este \u00e9 meu ID de e-mail: <\/i>abhi123@cb.com\"<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9108 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.20.50-PM.png\" alt=\"Stock Tokenizers\" width=\"956\" height=\"390\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.20.50-PM.png 956w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.20.50-PM-300x122.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.20.50-PM-768x313.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.20.50-PM-20x8.png 20w\" sizes=\"auto, (max-width: 956px) 100vw, 956px\" \/><\/p>\n<p class=\"p1\">Alguns tokenizadores configur\u00e1veis ...<\/p>\n<ul class=\"ul1\">\n<li style=\"list-style-type: none\">\n<ul class=\"ul1\">\n<li class=\"li1\"><b>Exce\u00e7\u00e3o<\/b> .. Esse tokenizador permite que o usu\u00e1rio insira padr\u00f5es de exce\u00e7\u00e3o (express\u00f5es regulares) sobre os tokenizadores de estoque.<\/li>\n<li class=\"li1\"><b>Regexp<\/b> .. Esse tokenizador extrai o texto que corresponde ao padr\u00e3o (uma express\u00e3o regular) como tokens.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"p1\">Por exemplo:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9112 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.24.20-PM.png\" alt=\"Regexp Tokenizer Example\" width=\"693\" height=\"126\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.24.20-PM.png 693w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.24.20-PM-300x55.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.24.20-PM-20x4.png 20w\" sizes=\"auto, (max-width: 693px) 100vw, 693px\" \/><\/p>\n<h4 class=\"p1\"><b>Filtro de caracteres<\/b><\/h4>\n<p class=\"p3\">Os filtros de caracteres servem para remover ou substituir caracteres indesej\u00e1veis.<\/p>\n<p class=\"p3\">Filtros de caracteres de estoque ...<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9113 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.25.28-PM.png\" alt=\"Stock Character Filters\" width=\"961\" height=\"319\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.25.28-PM.png 961w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.25.28-PM-300x100.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.25.28-PM-768x255.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.25.28-PM-20x7.png 20w\" sizes=\"auto, (max-width: 961px) 100vw, 961px\" \/><\/p>\n<p class=\"p1\">Um filtro de caracteres configur\u00e1vel ...<\/p>\n<ul class=\"ul1\">\n<li style=\"list-style-type: none\">\n<ul class=\"ul1\">\n<li class=\"li1\"><b>Regexp<\/b> .. Aceita uma express\u00e3o regular v\u00e1lida e uma cadeia de caracteres de substitui\u00e7\u00e3o para substituir o padr\u00e3o correspondente.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"p1\">Por exemplo:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9114 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.26.14-PM.png\" alt=\"Regexp Character Filter Example\" width=\"885\" height=\"204\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.26.14-PM.png 885w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.26.14-PM-300x69.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.26.14-PM-768x177.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.26.14-PM-20x5.png 20w\" sizes=\"auto, (max-width: 885px) 100vw, 885px\" \/><\/p>\n<h4 class=\"p1\"><b>Filtro de token<\/b><\/h4>\n<p class=\"p3\">Os filtros de token aceitam um fluxo de token fornecido por um tokenizador e fazem modifica\u00e7\u00f5es nos tokens do fluxo. As formas mais comuns de filtragem de tokens s\u00e3o normaliza\u00e7\u00e3o e stemiza\u00e7\u00e3o.<\/p>\n<p class=\"p3\">V\u00e1rios filtros de tokens de a\u00e7\u00f5es, aqui est\u00e3o alguns dos mais importantes.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9115 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.20-PM.png\" alt=\"Stock Token Filters\" width=\"959\" height=\"599\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.20-PM.png 959w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.20-PM-300x187.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.20-PM-768x480.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.20-PM-20x12.png 20w\" sizes=\"auto, (max-width: 959px) 100vw, 959px\" \/><\/p>\n<p class=\"p1\">Filtros de token configur\u00e1veis ...<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9116 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM.png\" alt=\"Configurable Token Filters\" width=\"957\" height=\"950\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM.png 957w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-300x298.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-150x150.png 150w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-768x762.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-65x65.png 65w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-50x50.png 50w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.27.56-PM-20x20.png 20w\" sizes=\"auto, (max-width: 957px) 100vw, 957px\" \/><\/p>\n<h3 class=\"p1\"><b>Analisadores de estoque<\/b><\/h3>\n<p class=\"p3\">Com o mecanismo de pesquisa de texto completo do Couchbase, os analisadores e todos os seus componentes trabalham no texto que constitui os valores de campo nos documentos JSON. Eles n\u00e3o trabalham com nomes de campos.<\/p>\n<p class=\"p3\">Considere o documento JSON:<\/p>\n<pre class=\"\">{\r\n    \"field1\": \"value1\",\r\n    \"field2\": \"value2\",\r\n    \"array_field3\": [\r\n        \"value3\",\r\n        \"value4\"\r\n    ],\r\n    \"object_field4\": {\r\n        \"field5\": \"value5\",\r\n        \"field6\": \"value6\"\r\n    }\r\n}<\/pre>\n<p class=\"p1\">Para o documento, os analisadores podem ser definidos para trabalhar em \"value1\", \"value2\", \"value3\", \"value4\", \"value5\" e \"value6\".<\/p>\n<p class=\"p1\">O Couchbase oferece v\u00e1rios analisadores de a\u00e7\u00f5es.<\/p>\n<p class=\"p1\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-12364\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2021-10-25-at-9.29.39-AM.png\" alt=\"\" width=\"790\" height=\"275\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2021-10-25-at-9.29.39-AM.png 735w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2021-10-25-at-9.29.39-AM-300x104.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2021-10-25-at-9.29.39-AM-20x7.png 20w\" sizes=\"auto, (max-width: 790px) 100vw, 790px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p class=\"p1\">Aqui est\u00e3o alguns exemplos...<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9119\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.34.28-PM.png\" alt=\"Keyword Analyzer\" width=\"850\" height=\"326\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.34.28-PM.png 1008w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.34.28-PM-300x115.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.34.28-PM-768x295.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.34.28-PM-20x8.png 20w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9128\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM.png\" alt=\"\" width=\"875\" height=\"327\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM.png 1046w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM-300x112.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM-1024x383.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM-768x287.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-5.27.39-PM-20x7.png 20w\" sizes=\"auto, (max-width: 875px) 100vw, 875px\" \/><\/p>\n<h3 class=\"p1\"><b>Configura\u00e7\u00e3o de um analisador personalizado<\/b><\/h3>\n<ul class=\"ul1\">\n<li>O segredo para projetar um analisador personalizado n\u00e3o \u00e9 apenas escolher o tokenizador e os filtros corretos, mas tamb\u00e9m aplic\u00e1-los na ordem correta.<\/li>\n<li class=\"li3\">Portanto, a primeira etapa seria configurar quaisquer tokenizadores, filtros de caracteres e filtros de tokens personalizados (juntamente com listas de palavras personalizadas), se necess\u00e1rio.<\/li>\n<li class=\"li3\">Em seguida, crie o analisador escolhendo o tokenizador, os filtros de caracteres e os filtros de tokens desejados. Se voc\u00ea tiver configurado algum filtro personalizado, ele ser\u00e1 exibido na lista de op\u00e7\u00f5es dispon\u00edveis.<\/li>\n<li class=\"li3\">A ORDEM dos filtros de caracteres e de tokens escolhidos pode fazer diferen\u00e7a no resultado obtido.<\/li>\n<li class=\"li3\">Ao escolher um valor de campo para indexar, escolha o analisador desejado para ele. Caso contr\u00e1rio, um analisador ser\u00e1 herdado para ele do mapeamento pai. As op\u00e7\u00f5es personalizadas ser\u00e3o exibidas na lista de op\u00e7\u00f5es dispon\u00edveis.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9121\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-4.35.46-PM.png\" alt=\"Configuring a text analyzer\" width=\"861\" height=\"344\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.35.46-PM.png 906w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.35.46-PM-300x120.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.35.46-PM-768x307.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-4.35.46-PM-20x8.png 20w\" sizes=\"auto, (max-width: 861px) 100vw, 861px\" \/><\/p>\n<h3 class=\"p1\"><b>Playground de an\u00e1lise de texto<\/b><\/h3>\n<p class=\"p3\">Teste o comportamento de nossos analisadores de estoque e de seus analisadores personalizados aqui.<\/p>\n<p class=\"p4\"><span class=\"s1\"><a href=\"https:\/\/bleveanalysis.couchbase.com\">https:\/\/bleveanalysis.couchbase.com<\/a><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-9122\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM.png\" alt=\"Bleve Text Analysis Wizard \" width=\"977\" height=\"667\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM.png 1298w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM-300x205.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM-1024x699.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM-768x524.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM-235x160.png 235w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2020\/08\/Screen-Shot-2020-08-10-at-1.58.24-PM-20x14.png 20w\" sizes=\"auto, (max-width: 977px) 100vw, 977px\" \/><\/p>\n<p>Aqui est\u00e1 uma boa leitura sobre as pr\u00e1ticas recomendadas ao usar o Full Text Search do Couchbase.<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"ke5B67NlbB\"><p><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/full-text-search-indexing-best-practices-by-use-case\/\">Pr\u00e1ticas recomendadas de indexa\u00e7\u00e3o de pesquisa de texto completo por caso de uso<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&quot;Pr\u00e1ticas recomendadas de indexa\u00e7\u00e3o de pesquisa de texto completo por caso de uso&quot; - The Couchbase Blog\" src=\"https:\/\/www.couchbase.com\/blog\/full-text-search-indexing-best-practices-by-use-case\/embed\/#?secret=FnBNkY1Qeh#?secret=ke5B67NlbB\" data-secret=\"ke5B67NlbB\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>","protected":false},"excerpt":{"rendered":"<p>Full-Text Search refers to techniques for searching text content within a document or a collection of documents that hold textual content. A Full-Text search engine examines all the textual content within documents as it tries to match a single search [&hellip;]<\/p>","protected":false},"author":37266,"featured_media":10014,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2165,1820,7277],"tags":[1584,1261],"ppma_author":[8925],"class_list":["post-9102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-full-text-search","category-golang","category-text-analysis","tag-bleve","tag-json"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v26.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Text Analysis within a Full-Text Search Engine - The Couchbase Blog<\/title>\n<meta name=\"description\" content=\"Couchbase\u2019s Full-Text Search (FTS) Engine is powered by Bleve, and this article will showcase text analysis within this engine.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/pt\/full-text_search_text_analysis\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Text Analysis within a Full-Text Search Engine\" \/>\n<meta property=\"og:description\" content=\"Couchbase\u2019s Full-Text Search (FTS) Engine is powered by Bleve, and this article will showcase text analysis within this engine.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/pt\/full-text_search_text_analysis\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2020-08-10T23:24:52+00:00\" \/>\n<meta property=\"article:modified_time\" 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