go get go.ngs.io/jplaw-xml

package main

import (
	"encoding/xml"
	"io"
	"log"
	"os"

	"go.ngs.io/jplaw-xml"
)

func main() {
	file, err := os.Open("path/to/law.xml")
	if err != nil {
		log.Fatalf("Failed to open file: %v", err)
	}
	defer file.Close()

	data, err := io.ReadAll(file)
	if err != nil {
		log.Fatalf("Failed to read file: %v", err)
	}

	var law jplaw.Law
	err = xml.Unmarshal(data, &law)
	if err != nil {
		log.Fatalf("Failed to parse XML: %v", err)
	}

	// Access law metadata
	log.Println("Law Number:", law.LawNum)
	log.Println("Era:", law.Era)
	log.Println("Year:", law.Year)
	
	// Access law title
	if law.LawBody.LawTitle != nil {
		log.Println("Title:", law.LawBody.LawTitle.Content)
		log.Println("Kana:", law.LawBody.LawTitle.Kana)
	}

	// Iterate through table of contents
	if law.LawBody.TOC != nil {
		for _, chapter := range law.LawBody.TOC.TOCChapter {
			log.Printf("Chapter %s: %s", chapter.Num, chapter.ChapterTitle.Content)
		}
	}

	// Access main provisions
	for _, chapter := range law.LawBody.MainProvision.Chapter {
		log.Printf("Chapter: %s", chapter.ChapterTitle.Content)
		for _, article := range chapter.Article {
			if article.ArticleTitle != nil {
				log.Printf("  Article %s: %s", article.Num, article.ArticleTitle.Content)
			}
		}
	}
}

law := jplaw.Law{
	Era:     jplaw.EraReiwa,
	Year:    5,
	Num:     "1",
	LawType: jplaw.LawTypeAct,
	Lang:    jplaw.LanguageJapanese,
	LawNum:  "令和五年法律第一号",
	LawBody: jplaw.LawBody{
		LawTitle: &jplaw.LawTitle{
			Content: "テスト法",
			Kana:    "てすとほう",
		},
		MainProvision: jplaw.MainProvision{
			Article: []jplaw.Article{
				{
					Num: "1",
					ArticleTitle: &jplaw.ArticleTitle{
						Content: "目的",
					},
					Paragraph: []jplaw.Paragraph{
						{
							Num: 1,
							ParagraphNum: jplaw.ParagraphNum{
								Content: "1",
							},
							ParagraphSentence: jplaw.ParagraphSentence{
								Sentence: []jplaw.Sentence{
									{
										Content: "この法律は、テストを目的とする。",
									},
								},
							},
						},
					},
				},
			},
		},
	},
}

// Marshal to XML
data, err := xml.MarshalIndent(law, "", "  ")
if err != nil {
	log.Fatal(err)
}
fmt.Println(string(data))

// Eras
jplaw.EraShowa
jplaw.EraHeisei  
jplaw.EraReiwa

// Law Types
jplaw.LawTypeAct
jplaw.LawTypeImperialOrdinance
jplaw.LawTypeCabinetOrder

// Languages
jplaw.LanguageJapanese
jplaw.LanguageEnglish

// Writing Modes
jplaw.WritingModeVertical
jplaw.WritingModeHorizontal

go test -v