Examples of feeds by categories

<offer id="18291" available="true">
  <name>Bosch TDS 4040 steam generator</name>
  <typePrefix>Steam generator</typePrefix>
  <model>TDS 4040</model>
  <vendor>Bosch</vendor>
  <description>Power: 2400 W; Constant steam supply: yes; Vertical steaming: yes; Weight: 3.4 kg; Automatic shutdown: yes; Automated steam adjustment: yes; Steam shock flow rate: 270 g/min; Maximum steam pressure: 5.5 bar;</description>
  <vendorCode>100028173415</vendorCode>
  <param name="Color">white, blue, gray</param>
  <param name="Material">Plastic</param>   
  <param name="Dimensions" unit="cm">Length 38.5 Width 19.2 Height 26</param>
  <param name="Length" unit="cm">38.5</param>
  <param name="Width" unit="cm">19.2</param>
  <param name="Height" unit="cm">26</param>
  <condition>new</condition>
  <categories>123</categories>
  <picture>https://avatars.mds.yandex.net/get-mpic/5209485/img_id4945386046892792794.jpeg/orig</picture>
  <url>https://market.yandex.ru/product--parogenerator-bosch-tds-4040/1807277658</url>
  <price>11670</price>
  <oldprice>12000</price>
</offer>
              

<offer id="18291" available="true">
  <name>Ultra-resistant matte lip pencil Kylie matte liquid lipstick & lip pencil</name>
  <vendor>Kylie</vendor>
  <price>982.00</price>
  <oldprice>1560.19</oldprice>
  <url>https://example.ru/cosmetics/lip-gloss_07/kylie/lip-gloss-pencil-kylie-matte-liquid-lipstick--lip-liner12colors/</url>
  <currencyId>RUB</currencyId>
  <categoryId>1809</categoryId>
  <picture>https://example.ru/wa-data/public/shop/products/91/82/18291/images/13653/13653.970.jpeg</picture>
  <picture>https://example.ru/wa-data/public/shop/products/91/82/18291/images/13750/13750.970.jpg</picture>
  <picture>https://example.ru/wa-data/public/shop/products/91/82/18291/images/16256/16256.970.jpg</picture>
  <description>	<![CDATA[ <p>Lip Pencil: Ultra-resistant lip pencil has a creamy texture that glides easily on the lips, it's very easy and convenient to apply. The lip pencil is easily sharpened in most standard sharpeners.</p> ]]></description>
  <param name="Color">Red</param>
  <param name="Volume"></param>
  <param name="Gender">Female</param>
  <param name="Age">For adults</param>
</offer>
            

<offer id="499871680344" available="true">
  <url>https://www.example.ru/soft-furniture/loft-ellou/</url>
  <price>29400</price>
  <oldprice>35280</oldprice>
  <currencyId>RUB</currencyId>
  <categoryId>1</categoryId>
  <picture>https://www.example.ru/model-image/loft-ellou-1400x1400-32405.jpg</picture>
  <vendor>Monolith factory</vendor>
  <model>Loft Yellow</model>
  <typePrefix>Sofa</typePrefix>
  <name>Sofa Loft Yellow convertible Monolith factory</name>
  <description>
  <![CDATA[ Modern sofa Loft Yellow. A durable convertible sofa mechanism and large comfortable pillows. Large sleeping area. Filler — PU foam + belts — Convertible sofa mechanism (two modules) — Stuffed pillows: foam crumb + hollow fiber — Fabric only as the one in photo: velour max yellow 27 — Seat height, 44 cm — Seat depth without pillows, 82 cm — Seat depth with pillows, 57 cm — Foam thickness in the sleeping area, 10 cm — Linen drawer made of chipboard. Overall dimensions: 250 × 97 × 95(150 × 200). ]]>
  </description>
  <param name="Length" unit="cm">250</param>
  <param name="Width" unit="cm">97</param>
  <param name="Height" unit="cm">95</param>
  <param name="Size" unit="cm">Length 250 Width 97 Height 95</param>
  <param name="Mechanism">convertible</param>
  <param name="Color">gray</param>
  <param name="Material">Hessian fabric</param>
</offer>
            

<offer id="44" available="true">
  <url>https://example.ru/katalog-tovarov/vitaminy/vitaminy-gruppy-b/kompleks-vitaminov-b-50-now-100-tab</url>
  <price>1799</price>
  <oldprice>2000</oldprice>
  <currencyId>RUB</currencyId>
  <categoryId>160</categoryId>
  <store>true</store>
  <pickup>true</pickup>
  <name>NOW — Vitamin B-50 complex, 100 capsules</name>
  <vendor>Now Foods</vendor>
  <picture>https://example.ru/assets/cache/images/vitamin/gruppa_b/kompleks-vitaminov-b-50-now-100-tab-01-x-7bd.jpeg</picture>
  <description>
  <![CDATA[ The B-50 vitamin complex will provide you with the most important B vitamins that are responsible for many processes in the human body. These vitamins are responsible for the growth and strengthening of hair and they also strengthen the nervous system. ]]>
  </description>
</offer>
          

<offer id="15322" available="true">
  <url>https://example.ru/catalog/jersey/product/FM220311B/</url>
  <price>8550.00</price>
  <currencyId>RUB</currencyId>
  <categoryId>5</categoryId>
  <picture>https://example.ru/upload/iblock/f6a/f6a5c906e5a473034a26b7db5b2e24ba.jpg</picture>
  <name>Long Fitted Knitted Black Bustier Dress</name>
  <vendor>You wanna</vendor>
  <description>"Sexy fitted knitted dress. The dress' peculiarity is in its straps, which attract attention with their unusual shape. Whether your shoes are high or low, the dress will do its job
  <br/>
  -dress
  <br/>
  -knitwear
  <br/>
  -bustier"
  </description>
  <param name="Color">Black</param>
  <param name="Size">ONE SIZE</param>
  <param name="Material">Viscose</param>
  <param name="Gender">Female</param>
  <param name="Age">For adults</param>
</offer>
            

<offers>
  <offer id="123" available="true" type="vendor.model">
  <typePrefix>Mountain Bike</typePrefix>
  <model>26.1 V</model>
  <vendor>ABCD</vendor> 
  <vendorCode>F2DDVX67DV</vendorCode>
  <description>A  mountain bike with wide tires, combining reliability and versatility. Effective both in the city and outside. The model is suitable for both beginners and experienced riders.</description>
  <categoryId>2</categoryId>
  <picture>https://domain/btrx/i/11/97/66/48/01_808.jpg</picture>
  <picture>https://domainbtrx/i/11/97/66/48/01_808.jpg</picture>
  <url>https://www.магазин-велосипедов.рф/product/F2DDVX67DV</url>
  <price>17680</price>
  <oldprice>20000</price>
  <param name="Color">White</param>
  <param name="Material">Aluminium</param>  
  <param name="Gender">Unisex</param>
  <param name="Age">For adults</param>
  </offer>
</offers>
            

<offer id="379" available="true">
  <url>https://example.ru/ukrasheniya/kolco_black_ring/</url>
  <price>900</price>
  <oldprice>2000</oldprice>
  <currencyId>RUB</currencyId>
  <categoryId>85</categoryId>
  <picture>https://example.ru/image/catalog/Jewellery/Ring/DSC_012971.jpg</picture>
  <picture>https://example.ru/image/catalog/Jewellery/Ring/DSC_01254.jpg</picture>
  <picture>https://example.ru/image/catalog/Jewellery/Ring/DSC_01314.jpg</picture>
  <picture>https://example.ru/image/catalog/Jewellery/Ring/DSC_01273.jpg</picture>
  <picture>https://example.ru/image/catalog/Jewellery/Ring/DSC_0126.jpg</picture>
  <delivery>true</delivery>
  <name>Silver Ring with Black Enamel King Black Ring</name>
  <vendor>King</vendor>
  <model>Black Ring</model>
  <typePrefix>Silver Ring</typePrefix>
  <description>
  <![CDATA[ <div style="text-align: center;"><div style="text-align: left;">The ring is made of jewelry alloy, rhodium plated and enamel.<br></div><div style="text-align: left;"><br></div><div style="text-align: left;"><b>Color: </b>silver with black enamel.</div><div style="text-align: left;"><br></div></div><p><b>Care</b>: Dry the ring after water treatment.</p><p>Avoid contact with alcohol-containing substances.</p><p style="box-sizing: inherit; margin-bottom: 1rem; padding: 0px; font-size: 12px; line-height: 1.5; text-rendering: optimizelegibility; font-family: Jil-Futura, Futura, "Helvetica Neue", Helvetica, Arial, sans-serif; letter-spacing: 0.02em;"><span style="box-sizing: inherit; text-size-adjust: 100%;"><span style="box-sizing: inherit; font-weight: 600; line-height: inherit;">Product parameters</span></span><span style="font-size: 12px;">?one-size.</span><span style="letter-spacing: 0.24px;"><br></span></p><br> ]]>
  </description>
  <param name="Size">17</param>
  <param name="Material">Silver</param>
  <param name="Color">Silver, black</param>
  <param name="Gender">Unisex</param>
</offer>