{"id":691,"date":"2026-01-03T21:26:00","date_gmt":"2026-01-03T21:26:00","guid":{"rendered":"https:\/\/www.linkauthority.eu\/?p=691"},"modified":"2025-08-08T11:52:38","modified_gmt":"2025-08-08T11:52:38","slug":"processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web","status":"publish","type":"post","link":"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/","title":{"rendered":"Processo di estrazione e valutazione di parole web"},"content":{"rendered":"<ul>\n<li>\n<p>Vi mostro una pipeline semplice e modulare per estrarre parole ed espressioni utili dalle pagine web.<\/p>\n<\/li>\n<li>\n<p>Confronto TF-IDF, RAKE, TextRank e gli embedding, senza gergo superfluo, aggiungendo la mia opinione in ogni fase.<\/p>\n<\/li>\n<li>\n<p>Misurate la qualit\u00e0 con precisione: recall, F1, NDCG, poi procedete per iterazioni, con calma e in modo metodico.<\/p>\n<\/li>\n<li>\n<p>Si mette in produzione un flusso affidabile e monitorato, con avvisi relativi all'attualit\u00e0 e alla qualit\u00e0.<\/p>\n<\/li>\n<li>\n<p>Fornisco esempi strutturati, liste di controllo e una selezione di strumenti pronti all\u2019uso.<\/p>\n<\/li>\n<\/ul>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenuti<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Mostra\/Nascondi Indice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Introduction_cas_dusage\" >Introduzione ai casi d'uso<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Vue_densemble_du_pipeline\" >Panoramica della pipeline<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Collecte_extraction_du_contenu\" >Raccolta ed estrazione dei contenuti<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Decouverte_dURLs\" >Individuazione degli URL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Extraction_HTML_%E2%86%92_texte\" >Conversione da HTML a testo<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Pretraitement_linguistique\" >Pre-elaborazione linguistica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Methodes_dextraction_de_termes\" >Metodi di estrazione dei termini<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#TF-IDF\" >TF-IDF<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Frequences_n-grammes\" >Frequenze degli n-grammi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#RAKE\" >RAKE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#TextRank\" >TextRank<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Embeddings_KeyBERTtransformers\" >Embedding (KeyBERT\/Transformer)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Thematisation_LDABERTopic\" >Tematizzazione (LDA\/BERTopic)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Priorisation_editoriale\" >Priorit\u00e0 editoriali<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Evaluation_metriques\" >Valutazione delle metriche<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Verites_terrain\" >Realt\u00e0 sul campo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Metriques_de_qualite\" >Indicatori di qualit\u00e0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Protocole_devaluation\" >Protocollo di valutazione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Cadence_et_seuils\" >Frequenza e soglie<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Mise_en_production_monitoring\" >Monitoraggio della messa in produzione<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Indicateurs_a_suivre\" >Indicatori da monitorare<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Conformite_et_ethique\" >Conformit\u00e0 ed etica<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Exemples_structures\" >Esempi strutturati<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Fiche_page\" >Scheda della pagina<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Page_transactionnelle\" >Pagina di transazione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Page_informationnelle\" >Pagina informativa<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Outils_ressources\" >Strumenti e risorse<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#NLP\" >PNL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Extraction\" >Estrazione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Crawl\" >Crawl<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Vectorisation_themes\" >Vettorializzazione dei temi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Evaluation_tableaux_de_bord\" >Valutazione dei cruscotti<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#FAQ\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Comment_extraire_le_texte_propre_dune_page_web%E2%80%89\" >Come si estrae il testo pulito da una pagina web?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Quelles_methodes_pour_detecter_les_mots_importants%E2%80%89\" >Quali metodi si possono utilizzare per individuare le parole chiave?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Comment_mesurer_la_qualite_des_mots_extraits%E2%80%89\" >Come si misura la qualit\u00e0 delle parole estratte?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Quels_outils_utiliser_selon_mon_niveau_technique%E2%80%89\" >Quali strumenti dovrei usare in base al mio livello tecnico?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Glossaire\" >Glossario<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.linkauthority.eu\/it\/processo-per-estrarre-e-valutare-le-parole-dalle-pagine-web\/#Checklist_rapide\" >Lista di controllo rapida<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction_cas_dusage\"><\/span>Introduzione ai casi d'uso<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Quando estraggo parole dalle pagine web, cerco valore aziendale, non poesia. Per voi, redattori, data scientist e sviluppatori, questi termini servono a individuare l\u2019intenzione di ricerca, arricchire i brief editoriali, alimentare i modelli di ricerca interna, stabilire le priorit\u00e0 degli argomenti e monitorare la concorrenza. Parlo in modo semplice, ma vado al nocciolo della questione, perch\u00e9 dovete decidere, non indovinare.<\/p>\n<ul>\n<li>\n<p><strong>Rep\u00e9rer l\u2019intention<\/strong>, et le champ lexical dominant des concurrents, pour cibler juste.<\/p>\n<\/li>\n<li>\n<p><strong>Am\u00e9liorer les briefs<\/strong>, pour \u00e9viter des contenus creux, et gagner du temps.<\/p>\n<\/li>\n<li>\n<p><strong>Alimenter la recherche interne<\/strong>, avec des synonymes, des variantes, des expressions.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Vue_densemble_du_pipeline\"><\/span>Panoramica della pipeline<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Je recommande un pipeline en sept \u00e9tapes, clair, r\u00e9plicable, qui supporte l\u2019it\u00e9ration rapide.<\/p>\n<ul>\n<li>\n<p><strong>Collecte des URLs<\/strong>, sur sitemaps, logs, exports GSC, ou crawl.<\/p>\n<\/li>\n<li>\n<p><strong>Conversione da HTML a testo<\/strong>, en retirant le chrome visuel, en gardant le sens.<\/p>\n<\/li>\n<li>\n<p><strong>Nettoyage normalisation<\/strong>, pour des tokens coh\u00e9rents, comparables.<\/p>\n<\/li>\n<li>\n<p><strong>Tokenisation lemmatisation<\/strong>, avec n-grammes judicieux, 2 \u00e0 3 mots.<\/p>\n<\/li>\n<li>\n<p><strong>M\u00e9thodes d\u2019extraction<\/strong>, adapt\u00e9es au volume, au d\u00e9lai, \u00e0 la qualit\u00e9 attendue.<\/p>\n<\/li>\n<li>\n<p><strong>\u00c9valuation it\u00e9ration<\/strong>, avec des m\u00e9triques stables, et des v\u00e9rit\u00e9s terrain.<\/p>\n<\/li>\n<li>\n<p><strong>Monitoraggio della messa in produzione<\/strong>, pour livrer, mesurer, corriger.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Collecte_extraction_du_contenu\"><\/span>Raccolta ed estrazione dei contenuti<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Decouverte_dURLs\"><\/span>Individuazione degli URL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je privil\u00e9gie une approche mixte, sobre, qui limite la charge serveur, tout en couvrant le p\u00e9rim\u00e8tre utile.<\/p>\n<ul>\n<li>\n<p><i>Mappe del sito XML<\/i>, rapides, fiables, souvent oubli\u00e9s, pourtant pr\u00e9cieux.<\/p>\n<\/li>\n<li>\n<p><i>Crawl<\/i> contr\u00f4l\u00e9 (profondeur, robots.txt, limites de taux), pour explorer, pas pour tout aspirer.<\/p>\n<\/li>\n<li>\n<p><i>Exports<\/i> Search Console et <i>logs<\/i>, pour capter l\u2019usage r\u00e9el, pas seulement l\u2019intention.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Extraction_HTML_%E2%86%92_texte\"><\/span>Conversione da HTML a testo<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je nettoie sans brutaliser\u2009: je supprime menus, footers, scripts, styles\u2009; je garde h1\u2013h3, paragraphes, listes, attributs <i>alt<\/i>. Les pages multilingues, les encodages capricieux, exigent une normalisation stricte.<\/p>\n<ul>\n<li>\n<p><strong>Champs conseill\u00e9s<\/strong>\u2009: url, titre, texte_principal, sections, meta_description.<\/p>\n<\/li>\n<li>\n<p><strong>R\u00e8gle pratique<\/strong>\u2009: si le texte n\u2019est pas lisible par un humain, il ne le sera pas par l\u2019algo.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Pretraitement_linguistique\"><\/span>Pre-elaborazione linguistica<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Un bon pr\u00e9traitement vaut mieux qu\u2019un mod\u00e8le flamboyant. J\u2019uniformise, je simplifie, puis j\u2019enrichis.<\/p>\n<ul>\n<li>\n<p><strong>Normalisation<\/strong>\u2009: lowercase, gestion des accents, ponctuation, homog\u00e9n\u00e9it\u00e9.<\/p>\n<\/li>\n<li>\n<p><strong>Tokenisation<\/strong>\u2009: mots, n-grammes (2\u20133), fen\u00eatre glissante raisonnable.<\/p>\n<\/li>\n<li>\n<p><strong>Nettoyage<\/strong>\u2009: stopwords, chiffres, longueurs minimales, variantes proches.<\/p>\n<\/li>\n<li>\n<p><strong>Lemmatisation\/Stemmatisation<\/strong>, pour rapprocher les formes, stabiliser les scores.<\/p>\n<\/li>\n<li>\n<p><strong>D\u00e9tection de langue<\/strong>, indispensable sur des sites hybrides, multir\u00e9gions.<\/p>\n<\/li>\n<li>\n<p><strong>POS tagging<\/strong>\u2009: je favorise noms, adjectifs, parfois verbes d\u2019action.<\/p>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<p><strong>Param\u00e8tres cl\u00e9s<\/strong>\u2009: stopwords personnalis\u00e9s, longueur min\/max, fen\u00eatre n-grammes.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Methodes_dextraction_de_termes\"><\/span>Metodi di estrazione dei termini<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Je choisis l\u2019outil selon le volume, la latence, et l\u2019usage final. Mon avis\u2009: commencez simple, mesurez, puis sophistiquez.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"TF-IDF\"><\/span>TF-IDF<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Id\u00e9al pour prioriser des mots caract\u00e9ristiques d\u2019une page face \u00e0 un corpus. Je calcule un top-K par page, puis je d\u00e9duplique sur le site. Sobre, efficace, transparent.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Frequences_n-grammes\"><\/span>Frequenze degli n-grammi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Parfaits pour capter des expressions naturelles. Je regarde les cooccurrences, j\u2019\u00e9monde les g\u00e9n\u00e9riques, je garde des expressions cl\u00e9s lisibles.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"RAKE\"><\/span>RAKE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Rapide, sans corpus d\u2019entra\u00eenement\u2009; utile quand je n\u2019ai pas d\u2019historique. La qualit\u00e9 d\u00e9pend du nettoyage\u2009: soignez vos stopwords.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"TextRank\"><\/span>TextRank<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Les graphes de mots donnent souvent des expressions cr\u00e9dibles, surtout avec des poids POS. Un peu plus lent, mais robuste sur des contenus denses.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Embeddings_KeyBERTtransformers\"><\/span>Embedding (KeyBERT\/Transformer)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je score la similarit\u00e9 s\u00e9mantique document-terme, j\u2019obtiens des candidats pertinents, m\u00eame sans exact match. Co\u00fbteux, mais pr\u00e9cieux pour couvrir les synonymes.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thematisation_LDABERTopic\"><\/span>Tematizzazione (LDA\/BERTopic)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je regroupe les pages par th\u00e8mes, j\u2019extrais des termes \u00ab centro\u00efdes \u00bb, je croise avec l\u2019intention. Tr\u00e8s utile pour explorer un gros site, calmement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Priorisation_editoriale\"><\/span>Priorit\u00e0 editoriali<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p><strong>Intenzione<\/strong>\u2009: informationnelle, transactionnelle, navigationnelle.<\/p>\n<\/li>\n<li>\n<p><strong>Difficult\u00e9\/comp\u00e9titivit\u00e9<\/strong>\u2009: via un proxy externe, \u00e0 manier avec prudence.<\/p>\n<\/li>\n<li>\n<p><strong>Proximit\u00e9 marque\/produit<\/strong>, pour rester l\u00e9gitime, coh\u00e9rent.<\/p>\n<\/li>\n<li>\n<p><strong>Couverture actuelle<\/strong> vs opportunit\u00e9s, pour investir o\u00f9 cela compte.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Evaluation_metriques\"><\/span>Valutazione delle metriche<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Sans \u00e9valuation, vous pilotez \u00e0 vue. J\u2019installe des v\u00e9rit\u00e9s terrain, je s\u00e9pare entra\u00eenement, validation, test, puis je compare des approches, sereinement.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Verites_terrain\"><\/span>Realt\u00e0 sul campo<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>Listes de mots attendus par page, ou par th\u00e8me, avec annotations humaines.<\/p>\n<\/li>\n<li>\n<p>\u00c9chantillons stratifi\u00e9s par type de page, langue, fra\u00eecheur.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Metriques_de_qualite\"><\/span>Indicatori di qualit\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p><strong>Pr\u00e9cision, Rappel, F1<\/strong> sur top-K termes, lisibles par tous.<\/p>\n<\/li>\n<li>\n<p><strong>NDCG\/MAP<\/strong> pour \u00e9valuer le classement fin, utile quand K est grand.<\/p>\n<\/li>\n<li>\n<p><strong>Coh\u00e9rence th\u00e9matique<\/strong> (UMass\/NPMI) pour topics, pratique en exploration.<\/p>\n<\/li>\n<li>\n<p><strong>Taux de couverture<\/strong> des intentions, pour valider l\u2019utilit\u00e9 m\u00e9tier.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Protocole_devaluation\"><\/span>Protocollo di valutazione<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>D\u00e9finir K (ex. top-10 par page), rester constant, \u00e9viter les biais.<\/p>\n<\/li>\n<li>\n<p>Comparer aux termes de r\u00e9f\u00e9rence, analyser les erreurs\u2009: trop g\u00e9n\u00e9riques, hors sujet.<\/p>\n<\/li>\n<li>\n<p>It\u00e9rer sur pr\u00e9traitement, hyperparam\u00e8tres, choix des m\u00e9thodes.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cadence_et_seuils\"><\/span>Frequenza e soglie<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>\u00c9valuation initiale, puis mensuelle en production.<\/p>\n<\/li>\n<li>\n<p>Seuils d\u2019alerte sur F1 et NDCG, d\u00e9clenchant une investigation.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Mise_en_production_monitoring\"><\/span>Monitoraggio della messa in produzione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Je pr\u00e9f\u00e8re des briques simples, observables. Un orchestrateur pour le crawl, un service d\u2019extraction\/NLP, un stockage propre, une API sobre, un tableau de bord utile.<\/p>\n<ul>\n<li>\n<p><strong>Planificateur de crawl<\/strong>, fen\u00eatres horaires, priorit\u00e9s par sections.<\/p>\n<\/li>\n<li>\n<p><strong>Service d\u2019extraction NLP<\/strong>, stateless, facile \u00e0 scaler.<\/p>\n<\/li>\n<li>\n<p><strong>Stockage<\/strong>\u2009: documents, index de termes, historiques de scores.<\/p>\n<\/li>\n<li>\n<p><strong>API<\/strong> de restitution, filtrage par url, th\u00e8me, date.<\/p>\n<\/li>\n<li>\n<p><strong>Tableau de bord<\/strong> qualit\u00e9, pour suivre d\u2019un coup d\u2019\u0153il.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Indicateurs_a_suivre\"><\/span>Indicatori da monitorare<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>Fra\u00eecheur du contenu crawl\u00e9, par r\u00e9pertoire, par langue.<\/p>\n<\/li>\n<li>\n<p>F1\/NDCG glissants, sur un panel t\u00e9moin.<\/p>\n<\/li>\n<li>\n<p>Taux d\u2019erreurs d\u2019extraction\u2009: HTML cass\u00e9, 404, encodage.<\/p>\n<\/li>\n<li>\n<p>Co\u00fbt de calcul par page, et temps de bout en bout.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Conformite_et_ethique\"><\/span>Conformit\u00e0 ed etica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>Respect de robots.txt, charge serveur, politesse r\u00e9seau.<\/p>\n<\/li>\n<li>\n<p>Conformit\u00e9 juridique\u2009: CGU, donn\u00e9es personnelles, contenus sensibles.<\/p>\n<\/li>\n<li>\n<p>Gestion fine des langues, des r\u00e9gions, des doublons quasi identiques.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Exemples_structures\"><\/span>Esempi strutturati<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Je structure les donn\u00e9es pour qu\u2019elles soient exploitables, v\u00e9rifiables, et faciles \u00e0 auditer.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fiche_page\"><\/span>Scheda della pagina<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>url\u2009: <i>https:\/\/exemple.com\/guide-extraction<\/i><\/p>\n<\/li>\n<li>\n<p>titre\u2009: <i>Guide d\u2019extraction de texte<\/i><\/p>\n<\/li>\n<li>\n<p>texte_principal\u2009: <i>corps nettoy\u00e9, sans menus<\/i><\/p>\n<\/li>\n<li>\n<p>sections\u2009: <i>h1-h3, listes<\/i><\/p>\n<\/li>\n<li>\n<p>meta_description\u2009: <i>r\u00e9sum\u00e9 \u00e9ditorial<\/i><\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Page_transactionnelle\"><\/span>Pagina di transazione<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>url\u2009: <i>https:\/\/exemple.com\/produit-xyz<\/i><\/p>\n<\/li>\n<li>\n<p>sections\u2009: <i>caract\u00e9ristiques, avis, FAQ<\/i><\/p>\n<\/li>\n<li>\n<p>termes extraits\u2009: <i>prix, livraison, garantie, taille<\/i><\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Page_informationnelle\"><\/span>Pagina informativa<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>url\u2009: <i>https:\/\/exemple.com\/tutoriel-rake<\/i><\/p>\n<\/li>\n<li>\n<p>sections\u2009: <i>tutoriel, code, bonnes pratiques<\/i><\/p>\n<\/li>\n<li>\n<p>termes extraits\u2009: <i>RAKE, stopwords, n-grammes, score<\/i><\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Outils_ressources\"><\/span>Strumenti e risorse<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Je choisis les outils selon votre niveau, votre stack, et vos contraintes de temps.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NLP\"><\/span>PNL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>spaCy, NLTK, Stanza, pour lemmatisation, POS, d\u00e9tection de langue.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Extraction\"><\/span>Estrazione<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>BeautifulSoup, l, Readability, trafilatura, pour convertir HTML \u2192 texte propre.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Crawl\"><\/span>Crawl<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>Scrapy, Playwright pour pages dynamiques, orchestrateurs simples.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Vectorisation_themes\"><\/span>Vettorializzazione dei temi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>KeyBERT, sentence-transformers, BERTopic, LDA, selon budget et volume.<\/p>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Evaluation_tableaux_de_bord\"><\/span>Valutazione dei cruscotti<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>Notebooks pour l\u2019exp\u00e9rimentation, un dashboard minimal pour F1, NDCG, fra\u00eecheur.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Comment_extraire_le_texte_propre_dune_page_web%E2%80%89\"><\/span>Come si estrae il testo pulito da una pagina web?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je retire le chrome (menus, footers, scripts, styles), je garde titres, paragraphes, listes, attributs <i>alt<\/i>, puis je normalise encodage et espaces. L\u2019objectif\u2009: un texte lisible, stable, tra\u00e7able.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quelles_methodes_pour_detecter_les_mots_importants%E2%80%89\"><\/span>Quali metodi si possono utilizzare per individuare le parole chiave?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je commence par TF-IDF et fr\u00e9quences de n-grammes, je compare \u00e0 RAKE et TextRank, puis je teste une approche embeddings quand les volumes justifient l\u2019effort.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Comment_mesurer_la_qualite_des_mots_extraits%E2%80%89\"><\/span>Come si misura la qualit\u00e0 delle parole estratte?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Avec des v\u00e9rit\u00e9s terrain et des m\u00e9triques claires\u2009: pr\u00e9cision, rappel, F1 sur top-K, NDCG\/MAP pour l\u2019ordre, coh\u00e9rence th\u00e9matique pour les topics. Je fixe des seuils, j\u2019it\u00e8re.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quels_outils_utiliser_selon_mon_niveau_technique%E2%80%89\"><\/span>Quali strumenti dovrei usare in base al mio livello tecnico?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u00e9butant\u2009: trafilatura + TF-IDF. Interm\u00e9diaire\u2009: TextRank + POS. Avanc\u00e9\u2009: embeddings + BERTopic, pipeline orchestr\u00e9, monitoring qualit\u00e9.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Glossaire\"><\/span>Glossario<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>\n<p><strong>TF-IDF<\/strong>\u2009: score pond\u00e9rant fr\u00e9quence locale et raret\u00e9 globale.<\/p>\n<\/li>\n<li>\n<p><strong>RAKE<\/strong>\u2009: extraction de phrases cl\u00e9s par cooccurrences, sans entra\u00eenement.<\/p>\n<\/li>\n<li>\n<p><strong>TextRank<\/strong>\u2009: graphe de mots, score par \u00ab vote \u00bb des voisins.<\/p>\n<\/li>\n<li>\n<p><strong>Embeddings<\/strong>\u2009: vecteurs s\u00e9mantiques, proximit\u00e9 par similarit\u00e9.<\/p>\n<\/li>\n<li>\n<p><strong>NDCG<\/strong>\u2009: qualit\u00e9 d\u2019un classement, sensible \u00e0 la position.<\/p>\n<\/li>\n<li>\n<p><strong>F1<\/strong>\u2009: moyenne harmonique pr\u00e9cision\/rappel, lisible, compacte.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Checklist_rapide\"><\/span>Lista di controllo rapida<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>\n<p>D\u00e9finir le p\u00e9rim\u00e8tre d\u2019URLs, propre, prioris\u00e9.<\/p>\n<\/li>\n<li>\n<p>Nettoyer le HTML, garder les sections utiles.<\/p>\n<\/li>\n<li>\n<p>Normaliser, tokeniser, lemmatiser, r\u00e9gler les n-grammes.<\/p>\n<\/li>\n<li>\n<p>Lancer TF-IDF + n-grammes, comparer RAKE, TextRank, embeddings.<\/p>\n<\/li>\n<li>\n<p>\u00c9valuer sur top-K\u2009: pr\u00e9cision, rappel, F1, NDCG, puis it\u00e9rer.<\/p>\n<\/li>\n<li>\n<p>Mettre en production, monitorer fra\u00eecheur, F1\/NDCG, co\u00fbts, erreurs.<\/p>\n<\/li>\n<li>\n<p>Documenter les param\u00e8tres, les jeux d\u2019essai, les d\u00e9cisions.<\/p>\n<\/li>\n<\/ul>\n<p>Mon avis final, franc\u2009: privil\u00e9giez la simplicit\u00e9 qui se mesure, refusez la complexit\u00e9 qui s\u00e9duit, et installez un rituel d\u2019\u00e9valuation, r\u00e9gulier, serein.<\/p>","protected":false},"excerpt":{"rendered":"<p>Vi mostro una pipeline semplice e modulare per estrarre parole ed espressioni utili dalle pagine web. Potrete confrontare TF-IDF, RAKE, TextRank e gli embedding, senza gergo superfluo, con la mia opinione in ogni fase. Misurerete la qualit\u00e0 con precisione, utilizzando il recall, l\u2019F1 e l\u2019NDCG, per poi procedere con iterazioni graduali, con calma e in modo metodico. Metterete in produzione un flusso robusto e monitorato\u2026<\/p>","protected":false},"author":1,"featured_media":693,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","saswp_custom_schema_field":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-691","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"modified_by":null,"_links":{"self":[{"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/posts\/691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/comments?post=691"}],"version-history":[{"count":0,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/posts\/691\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/media\/693"}],"wp:attachment":[{"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/media?parent=691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/categories?post=691"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linkauthority.eu\/it\/wp-json\/wp\/v2\/tags?post=691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}