Какой файл mapping.ttl лучше всего подходит для преобразования XML-файла в RDF с использованием библиотеки RML-Mapper? - PullRequest
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Какой файл mapping.ttl лучше всего подходит для преобразования XML-файла в RDF с использованием библиотеки RML-Mapper?

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/ 23 мая 2019

Я использую библиотеку RML-Mapper для преобразования XML-файла в rdf-файл. Для следующего файла XML, catalogs.xml, у меня проблемы с написанием лучшего файла mapping.ttl. У меня вопрос, что является лучшим файлом mapping.ttl для этого конкретного XML? Я предоставляю файлы catalogs.xml и catalog_mapping.ttl ниже ...

Каталоги. Xml файл 

<catalog>
    <product description="Cardigan Sweater" product_image="cardigan.jpg">
        <catalog_item gender="Men's">
            <item_number>QWZ5671</item_number>
            <price>39.95</price>
            <size description="Medium">
                <color_swatch image="red_cardigan.jpg">Red</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            </size>
            <size description="Large">
                <color_swatch image="red_cardigan.jpg">Red</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            </size>
        </catalog_item>
        <catalog_item gender="Women's">
            <item_number>RRX9856</item_number>
            <price>42.50</price>
            <size description="Small">
                <color_swatch image="red_cardigan.jpg">Red</color_swatch>
                <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
            </size>
            <size description="Medium">
                <color_swatch image="red_cardigan.jpg">Red</color_swatch>
                <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
                <color_swatch image="black_cardigan.jpg">Black</color_swatch>
            </size>
            <size description="Large">
                <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
                <color_swatch image="black_cardigan.jpg">Black</color_swatch>
            </size>
            <size description="Extra Large">
                <color_swatch image="burgundy_cardigan.jpg">Burgundy</color_swatch>
                <color_swatch image="black_cardigan.jpg">Black</color_swatch>
            </size>
        </catalog_item>
    </product>
    <product description="Turkish Jeans" product_image="cardigan.jpg">
        <catalog_item gender="Men's">
            <item_number>FDE456</item_number>
            <price>22</price>
            <size description="Small">
                <color_swatch image="red_cardigan.jpg">Blue</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Black</color_swatch>
            </size>
            <size description="Extra Small">
                <color_swatch image="red_cardigan.jpg">White</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Transparent</color_swatch>
            </size>
        </catalog_item>
        <catalog_item gender="Women's">
            <item_number>LKO478</item_number>
            <price>35</price>
            <size description="Small">
                <color_swatch image="red_cardigan.jpg">Red</color_swatch>
                <color_swatch image="navy_cardigan.jpg">Blue</color_swatch>
                <color_swatch image="burgundy_cardigan.jpg">Orange</color_swatch>
            </size>
            <size description="Large">
                <color_swatch image="navy_cardigan.jpg">Navy</color_swatch>
                <color_swatch image="black_cardigan.jpg">Black</color_swatch>
            </size>
            <size description="Extra Large">
                <color_swatch image="burgundy_cardigan.jpg">Pink</color_swatch>
                <color_swatch image="black_cardigan.jpg">Yellow</color_swatch>
            </size>
        </catalog_item>
    </product>
</catalog>

catalog_mapping.ttl 

@prefix rr: <http://www.w3.org/ns/r2rml#>.
@prefix rml: <http://semweb.mmlab.be/ns/rml#>.
@prefix ex: <http://example.com/ns#>.
@prefix ql: <http://semweb.mmlab.be/ns/ql#>.
@prefix transit: <http://vocab.org/transit/terms/>.
@prefix xsd: <http://www.w3.org/2001/XMLSchema#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.


 rr:ProductMapping
    rml:logicalSource [
        rml:source "Catalogs.xml";
        rml:referenceFormulation ql:XPath;
        rml:iterator "/catalog/product"
    ];

    rr:subjectMap [
        rr:template "http://ex.com/{@description}";
        rr:class ex:product
    ];

    rr:predicateObjectMap [
        rr:predicate ex:catalog_item;
            rr:objectMap [
                rr:parentTriplesMap rr:CatalogItemMapping;
                rr:joinCondition [
                    rr:child "/catalog/product/catalog_item";
                    rr:parent "/catalog/product"
                ]
            ]
     ].

 rr:CatalogItemMapping
    rml:logicalSource [
        rml:source "Catalogs.xml";
        rml:referenceFormulation ql:XPath;
        rml:iterator "/catalog/product/catalog_item"
    ];

    rr:subjectMap [
        rr:template "http://ex.com/{@gender}/id={item_number}";
    ];

    rr:predicateObjectMap [
        rr:predicate ex:item_number;
            rr:objectMap [
                rml:reference "item_number"
            ]
     ];

     rr:predicateObjectMap [
             rr:predicate ex:price;
                 rr:objectMap [
                     rml:reference "price"
                 ]
          ];

    rr:predicateObjectMap [
        rr:predicate ex:size_and_color;
        rr:objectMap [
            rr:template "{size/@description}_{size/color_swatch}"
        ]
    ].

Это мой текущий результат ...... 


<http://ex.com/Cardigan%20Sweater> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.com/ns#product> null
<http://ex.com/Turkish%20Jeans> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example.com/ns#product> null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#item_number> "QWZ5671" null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#price> "39.95" null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#size_and_color> <Medium_Red> null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#size_and_color> <Large_Red> null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#size_and_color> <Medium_Burgundy> null
<http://ex.com/Men%27s/id=QWZ5671> <http://example.com/ns#size_and_color> <Large_Burgundy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#item_number> "RRX9856" null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#price> "42.50" null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Small_Red> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Medium_Red> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Large_Red> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Extra%20Large_Red> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Small_Navy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Medium_Navy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Large_Navy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Extra%20Large_Navy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Small_Burgundy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Medium_Burgundy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Large_Burgundy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Extra%20Large_Burgundy> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Small_Black> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Medium_Black> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Large_Black> null
<http://ex.com/Women%27s/id=RRX9856> <http://example.com/ns#size_and_color> <Extra%20Large_Black> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#item_number> "FDE456" null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#price> "22" null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Small_Blue> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Extra%20Small_Blue> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Small_Black> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Extra%20Small_Black> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Small_White> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Extra%20Small_White> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Small_Transparent> null
<http://ex.com/Men%27s/id=FDE456> <http://example.com/ns#size_and_color> <Extra%20Small_Transparent> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#item_number> "LKO478" null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#price> "35" null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Red> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Red> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Red> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Blue> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Blue> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Blue> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Orange> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Orange> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Orange> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Navy> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Navy> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Navy> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Black> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Black> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Black> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Pink> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Pink> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Pink> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Small_Yellow> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Large_Yellow> null
<http://ex.com/Women%27s/id=LKO478> <http://example.com/ns#size_and_color> <Extra%20Large_Yellow> null

Является ли этот результат хорошим или есть лучший catalog_mapping.ttl, который может дать лучший результат?

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