diff --git a/2017/tools/xlsxread/src/config.rs b/2017/tools/xlsxread/src/config.rs
new file mode 100644
index 0000000..8a2cd4c
--- /dev/null
+++ b/2017/tools/xlsxread/src/config.rs
@@ -0,0 +1,146 @@
+use std::collections::HashMap;
+use std::fs;
+use std::path::Path;
+
+use serde::Deserialize;
+
+use crate::error::BuildError;
+
+// ---------------------------------------------------------------------------
+// Top-level dataset configuration loaded from a .toml file
+// ---------------------------------------------------------------------------
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct DatasetConfig {
+    pub reader: ReaderCfg,
+    pub columns: ColumnMap,
+    pub validation: ValidationCfg,
+    pub header: HeaderCfg,
+    pub schema: SchemaCfg,
+    /// field name → regex source string (one entry per scoreable subject)
+    pub scores: HashMap<String, String>,
+    pub insert: InsertCfg,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct ReaderCfg {
+    /// "all" → iterate every sheet (handles HCM/HN overflow); "first" → sheet 0 only
+    pub sheet_mode: SheetMode,
+    /// If true, skip rows where every cell is empty/null before counting (data-old2 quirk)
+    pub strip_blank_rows: bool,
+}
+
+#[derive(Debug, Deserialize, Clone, PartialEq, Eq)]
+#[serde(rename_all = "lowercase")]
+pub enum SheetMode {
+    All,
+    First,
+}
+
+/// Zero-indexed column positions in the source spreadsheet row.
+#[derive(Debug, Deserialize, Clone)]
+pub struct ColumnMap {
+    pub ho_ten: usize,
+    pub ngay_sinh: usize,
+    pub so_bao_danh: usize,
+    pub diem_thi: usize,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct ValidationCfg {
+    /// build-database-old.js / -old2.js require soBaoDanh to match ^\d+$
+    pub require_numeric_sbd: bool,
+    pub require_nonempty_name: bool,
+    pub require_nonempty_sbd: bool,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct HeaderCfg {
+    /// Tokens to match against row[0].to_uppercase() to detect a header row
+    pub tokens: Vec<String>,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct SchemaCfg {
+    /// DDL executed verbatim before inserts (CREATE TABLE + CREATE INDEX)
+    pub ddl: String,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct InsertCfg {
+    /// Parameterised INSERT OR REPLACE SQL using :named_param style
+    pub sql: String,
+}
+
+// ---------------------------------------------------------------------------
+// Loader
+// ---------------------------------------------------------------------------
+
+pub fn load_config(path: &Path) -> Result<DatasetConfig, BuildError> {
+    let text = fs::read_to_string(path).map_err(|e| BuildError::Io {
+        path: path.display().to_string(),
+        source: e,
+    })?;
+    let cfg: DatasetConfig = toml::from_str(&text)?;
+    Ok(cfg)
+}
+
+// ---------------------------------------------------------------------------
+// Unit tests
+// ---------------------------------------------------------------------------
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLE_TOML: &str = r#"
+[reader]
+sheet_mode = "all"
+strip_blank_rows = false
+
+[columns]
+ho_ten      = 0
+ngay_sinh   = 1
+so_bao_danh = 2
+diem_thi    = 3
+
+[validation]
+require_numeric_sbd   = false
+require_nonempty_name = true
+require_nonempty_sbd  = true
+
+[header]
+tokens = ["HO_TEN", "HỌ TÊN", "STT"]
+
+[schema]
+ddl = "CREATE TABLE student (so_bao_danh TEXT PRIMARY KEY);"
+
+[scores]
+toan    = 'Toán:\s*(\d+(?:\.\d+)?)'
+ngu_van = 'Ngữ văn:\s*(\d+(?:\.\d+)?)'
+
+[insert]
+sql = "INSERT OR REPLACE INTO student (so_bao_danh) VALUES (:so_bao_danh)"
+"#;
+
+    #[test]
+    fn config_round_trip() {
+        let cfg: DatasetConfig = toml::from_str(SAMPLE_TOML).expect("parse failed");
+        assert_eq!(cfg.reader.sheet_mode, SheetMode::All);
+        assert!(!cfg.reader.strip_blank_rows);
+        assert_eq!(cfg.columns.ho_ten, 0);
+        assert_eq!(cfg.columns.diem_thi, 3);
+        assert!(!cfg.validation.require_numeric_sbd);
+        assert!(cfg.validation.require_nonempty_name);
+        assert_eq!(cfg.header.tokens.len(), 3);
+        assert!(cfg.scores.contains_key("toan"));
+        assert!(cfg.scores.contains_key("ngu_van"));
+    }
+
+    #[test]
+    fn config_first_sheet_mode() {
+        let toml_str = SAMPLE_TOML.replace(r#"sheet_mode = "all""#, r#"sheet_mode = "first""#);
+        let cfg: DatasetConfig = toml::from_str(&toml_str).expect("parse failed");
+        assert_eq!(cfg.reader.sheet_mode, SheetMode::First);
+    }
+}
diff --git a/2017/tools/xlsxread/src/transform.rs b/2017/tools/xlsxread/src/transform.rs
new file mode 100644
index 0000000..bff5c21
--- /dev/null
+++ b/2017/tools/xlsxread/src/transform.rs
@@ -0,0 +1,398 @@
+/// Row transformation: ascii normalisation, score regex parsing, validation.
+///
+/// `to_ascii` replicates build-lib.js `toAscii` exactly:
+///   str.normalize("NFD").replace(/[̀-ͯ]/g,"").replace(/đ/gi,"d").toLowerCase()
+use std::collections::HashMap;
+
+use regex::Regex;
+use unicode_normalization::UnicodeNormalization;
+
+use crate::config::{DatasetConfig, ValidationCfg};
+use crate::error::BuildError;
+
+// ---------------------------------------------------------------------------
+// Compiled score patterns (built once at startup from config)
+// ---------------------------------------------------------------------------
+
+pub struct CompiledPatterns {
+    /// Ordered list so INSERT column order is deterministic
+    pub patterns: Vec<(String, Regex)>,
+}
+
+impl CompiledPatterns {
+    pub fn new(scores: &HashMap<String, String>) -> Result<Self, BuildError> {
+        let mut patterns = Vec::with_capacity(scores.len());
+        for (field, src) in scores {
+            let re = Regex::new(src).map_err(|e| BuildError::Regex {
+                pattern: src.clone(),
+                source: e,
+            })?;
+            patterns.push((field.clone(), re));
+        }
+        // Sort for deterministic order across HashMap iteration
+        patterns.sort_by(|a, b| a.0.cmp(&b.0));
+        Ok(Self { patterns })
+    }
+}
+
+// ---------------------------------------------------------------------------
+// to_ascii — must be byte-for-byte equivalent to build-lib.js toAscii
+// ---------------------------------------------------------------------------
+
+/// Normalise a Vietnamese name to an ASCII slug.
+///
+/// Algorithm mirrors the JavaScript `toAscii` in build-lib.js:
+///   1. NFD decompose (splits base + combining diacritics)
+///   2. Drop all Unicode combining marks (U+0300–U+036F)
+///   3. Replace đ/Đ with d (NFD does not decompose đ)
+///   4. Lowercase
+pub fn to_ascii(s: &str) -> String {
+    // Step 1 + 2: NFD then filter out combining marks (Unicode category M)
+    let decomposed: String = s
+        .nfd()
+        .filter(|c| !('\u{0300}'..='\u{036f}').contains(c))
+        .collect();
+
+    // Step 3: đ/Đ are not decomposed by NFD — replace explicitly
+    let replaced = decomposed.replace(['đ', 'Đ'], "d");
+
+    // Step 4: lowercase
+    replaced.to_lowercase()
+}
+
+// ---------------------------------------------------------------------------
+// Parsed row ready for DB insert
+// ---------------------------------------------------------------------------
+
+pub struct ParsedRow {
+    pub so_bao_danh: String,
+    pub ho_ten: String,
+    pub ho_ten_ascii: String,
+    pub ngay_sinh: Option<String>,
+    /// Subject field → float value; absent subjects not in map → NULL
+    pub scores: HashMap<String, f64>,
+}
+
+// ---------------------------------------------------------------------------
+// Row validation — mirrors the per-script skip logic
+// ---------------------------------------------------------------------------
+
+/// Returns `None` when the row should be skipped entirely (before sourceRows counter).
+/// Returns `Some(reason)` when the row should be counted as sourceRows but skipped.
+#[derive(Debug, PartialEq, Eq)]
+pub enum SkipReason {
+    /// Row is fully blank (data-old2 only, before sourceRows counter)
+    BlankRow,
+    /// soBaoDanh or hoTen empty/missing
+    EmptyField,
+    /// soBaoDanh contains non-digit characters (data-old / data-old2 guard)
+    NonNumericSbd,
+}
+
+/// Validates a raw cell slice against the dataset's `ValidationCfg`.
+/// Returns `Ok(())` on pass, `Err(SkipReason)` on fail.
+pub fn validate_row(
+    ho_ten: &str,
+    so_bao_danh: &str,
+    cfg: &ValidationCfg,
+    strip_blank_rows: bool,
+    all_blank: bool,
+) -> Result<(), SkipReason> {
+    // data-old2: skip fully blank rows BEFORE counting sourceRows
+    if strip_blank_rows && all_blank {
+        return Err(SkipReason::BlankRow);
+    }
+
+    if cfg.require_nonempty_sbd && so_bao_danh.is_empty() {
+        return Err(SkipReason::EmptyField);
+    }
+    if cfg.require_nonempty_name && ho_ten.is_empty() {
+        return Err(SkipReason::EmptyField);
+    }
+    if cfg.require_numeric_sbd && !so_bao_danh.chars().all(|c| c.is_ascii_digit()) {
+        return Err(SkipReason::NonNumericSbd);
+    }
+    Ok(())
+}
+
+// ---------------------------------------------------------------------------
+// Score parsing — mirrors build-lib.js parseScores
+// ---------------------------------------------------------------------------
+
+/// Parse a DIEM_THI cell string and extract matching subject scores.
+pub fn parse_scores(diem_thi: &str, patterns: &CompiledPatterns) -> HashMap<String, f64> {
+    let mut out = HashMap::new();
+    for (field, re) in &patterns.patterns {
+        if let Some(caps) = re.captures(diem_thi) {
+            if let Some(m) = caps.get(1) {
+                if let Ok(v) = m.as_str().parse::<f64>() {
+                    if v.is_finite() {
+                        out.insert(field.clone(), v);
+                    }
+                }
+            }
+        }
+    }
+    out
+}
+
+// ---------------------------------------------------------------------------
+// Full row transform
+// ---------------------------------------------------------------------------
+
+/// Extract and transform one spreadsheet row into a `ParsedRow`.
+/// `raw` is the full cell slice; column indices come from `cfg.columns`.
+pub fn transform_row(
+    raw: &[calamine::Data],
+    cfg: &DatasetConfig,
+    patterns: &CompiledPatterns,
+) -> ParsedRow {
+    let get = |idx: usize| -> String {
+        raw.get(idx)
+            .map(|cell| cell.to_string().trim().to_owned())
+            .unwrap_or_default()
+    };
+
+    let ho_ten = get(cfg.columns.ho_ten);
+    let ngay_sinh = get(cfg.columns.ngay_sinh);
+    let so_bao_danh = get(cfg.columns.so_bao_danh);
+    let diem_thi = raw
+        .get(cfg.columns.diem_thi)
+        .map(|c| c.to_string())
+        .unwrap_or_default();
+
+    let ho_ten_ascii = to_ascii(&ho_ten);
+    let scores = parse_scores(&diem_thi, patterns);
+    let ngay_sinh_opt = if ngay_sinh.is_empty() {
+        None
+    } else {
+        Some(ngay_sinh)
+    };
+
+    ParsedRow {
+        so_bao_danh,
+        ho_ten,
+        ho_ten_ascii,
+        ngay_sinh: ngay_sinh_opt,
+        scores,
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Unit tests — 20 cases for to_ascii (real Vietnamese names)
+// ---------------------------------------------------------------------------
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // Helper: assert to_ascii(input) == expected
+    fn check(input: &str, expected: &str) {
+        assert_eq!(
+            to_ascii(input),
+            expected,
+            "to_ascii({input:?}) expected {expected:?}"
+        );
+    }
+
+    #[test]
+    fn ascii_plain_latin() {
+        check("Nguyen Van A", "nguyen van a");
+    }
+
+    #[test]
+    fn ascii_nguyen_thi_hoa() {
+        check("Nguyễn Thị Hoa", "nguyen thi hoa");
+    }
+
+    #[test]
+    fn ascii_tran_van_duc() {
+        // đ/Đ replacement
+        check("Trần Văn Đức", "tran van duc");
+    }
+
+    #[test]
+    fn ascii_le_thi_my_duyen() {
+        check("Lê Thị Mỹ Duyên", "le thi my duyen");
+    }
+
+    #[test]
+    fn ascii_pham_thi_lan() {
+        check("Phạm Thị Lan", "pham thi lan");
+    }
+
+    #[test]
+    fn ascii_bui_thi_thu() {
+        check("Bùi Thị Thu", "bui thi thu");
+    }
+
+    #[test]
+    fn ascii_hoang_van_truong() {
+        check("Hoàng Văn Trường", "hoang van truong");
+    }
+
+    #[test]
+    fn ascii_do_thi_ngan() {
+        // Đ uppercase at start
+        check("Đỗ Thị Ngân", "do thi ngan");
+    }
+
+    #[test]
+    fn ascii_nguyen_van_khanh() {
+        check("Nguyễn Văn Khánh", "nguyen van khanh");
+    }
+
+    #[test]
+    fn ascii_trinh_thi_bich_ngoc() {
+        check("Trịnh Thị Bích Ngọc", "trinh thi bich ngoc");
+    }
+
+    #[test]
+    fn ascii_vu_thi_dieu() {
+        // ề = e + combining grave + combining circumflex (after NFD)
+        check("Vũ Thị Diệu", "vu thi dieu");
+    }
+
+    #[test]
+    fn ascii_nguyen_thi_tuong_vi() {
+        check("Nguyễn Thị Tường Vi", "nguyen thi tuong vi");
+    }
+
+    #[test]
+    fn ascii_lowercase_d_stroke() {
+        // Lowercase đ → d
+        check("đặng thị hằng", "dang thi hang");
+    }
+
+    #[test]
+    fn ascii_uppercase_d_stroke() {
+        check("ĐẶNG THỊ HẰNG", "dang thi hang");
+    }
+
+    #[test]
+    fn ascii_mixed_case() {
+        check("NGUYỄN VĂN AN", "nguyen van an");
+    }
+
+    #[test]
+    fn ascii_tran_thi_kim_anh() {
+        check("Trần Thị Kim Anh", "tran thi kim anh");
+    }
+
+    #[test]
+    fn ascii_nguyen_thi_phuong_thao() {
+        check("Nguyễn Thị Phương Thảo", "nguyen thi phuong thao");
+    }
+
+    #[test]
+    fn ascii_le_van_long() {
+        check("Lê Văn Long", "le van long");
+    }
+
+    #[test]
+    fn ascii_vo_thi_xuan_mai() {
+        check("Võ Thị Xuân Mai", "vo thi xuan mai");
+    }
+
+    #[test]
+    fn ascii_empty_string() {
+        check("", "");
+    }
+
+    // --- Score parsing tests ---
+
+    fn make_patterns() -> CompiledPatterns {
+        let mut map = HashMap::new();
+        map.insert("toan".into(), r"Toán:\s*(\d+(?:\.\d+)?)".into());
+        map.insert("ngu_van".into(), r"Ngữ văn:\s*(\d+(?:\.\d+)?)".into());
+        map.insert("vat_ly".into(), r"Vật lí:\s*(\d+(?:\.\d+)?)".into());
+        CompiledPatterns::new(&map).unwrap()
+    }
+
+    #[test]
+    fn parse_scores_single() {
+        let p = make_patterns();
+        let s = "Toán: 8.5";
+        let scores = parse_scores(s, &p);
+        assert_eq!(scores.get("toan"), Some(&8.5));
+        assert!(scores.get("ngu_van").is_none());
+    }
+
+    #[test]
+    fn parse_scores_multiple() {
+        let p = make_patterns();
+        let s = "Toán: 7.25  Ngữ văn: 6.0  Vật lí: 9";
+        let scores = parse_scores(s, &p);
+        assert_eq!(scores.get("toan"), Some(&7.25));
+        assert_eq!(scores.get("ngu_van"), Some(&6.0));
+        assert_eq!(scores.get("vat_ly"), Some(&9.0));
+    }
+
+    #[test]
+    fn parse_scores_empty_cell() {
+        let p = make_patterns();
+        let scores = parse_scores("", &p);
+        assert!(scores.is_empty());
+    }
+
+    // --- Validation tests ---
+
+    fn default_validation() -> ValidationCfg {
+        ValidationCfg {
+            require_numeric_sbd: false,
+            require_nonempty_name: true,
+            require_nonempty_sbd: true,
+        }
+    }
+
+    #[test]
+    fn validate_ok() {
+        let v = default_validation();
+        assert!(validate_row("Nguyen Van A", "12345678", &v, false, false).is_ok());
+    }
+
+    #[test]
+    fn validate_empty_sbd() {
+        let v = default_validation();
+        assert_eq!(
+            validate_row("Nguyen Van A", "", &v, false, false),
+            Err(SkipReason::EmptyField)
+        );
+    }
+
+    #[test]
+    fn validate_empty_name() {
+        let v = default_validation();
+        assert_eq!(
+            validate_row("", "12345678", &v, false, false),
+            Err(SkipReason::EmptyField)
+        );
+    }
+
+    #[test]
+    fn validate_non_numeric_sbd_rejected() {
+        let mut v = default_validation();
+        v.require_numeric_sbd = true;
+        assert_eq!(
+            validate_row("Nguyen Van A", "12AB5678", &v, false, false),
+            Err(SkipReason::NonNumericSbd)
+        );
+    }
+
+    #[test]
+    fn validate_numeric_sbd_accepted() {
+        let mut v = default_validation();
+        v.require_numeric_sbd = true;
+        assert!(validate_row("Nguyen Van A", "12345678", &v, false, false).is_ok());
+    }
+
+    #[test]
+    fn validate_blank_row_skipped() {
+        let v = default_validation();
+        // strip_blank_rows=true AND all_blank=true → BlankRow
+        assert_eq!(
+            validate_row("", "", &v, true, true),
+            Err(SkipReason::BlankRow)
+        );
+    }
+}