The start and end date are used to identify shipments that were updated in the window. The returned response includes all shipments, including the shipped ones. Shipstation will handle duplicates.

<?xml version="1.0" encoding="utf-8"?>
<Orders pages="1">
  <Order>
    <!-- shipment.id -->
    <OrderID><![CDATA[123456]]></OrderID>

    <!-- shipment.sales[0].reference or shipment.sales[0].number -->
    <OrderNumber><![CDATA[ABC123]]></OrderNumber>

    <!-- shipment.planned_date -->
    <OrderDate>10/18/2019 21:56 PM</OrderDate>

    <!-- 
        shipment.state mapping - user can map these states on Shipstation UI

        assigned
        packed
        done 
    -->
    <OrderStatus><![CDATA[paid]]></OrderStatus>

    <!-- shipment.write_date -->
    <LastModified>12/8/2011 12:56 PM</LastModified>

    <!-- shipment.carrier.service -->
    <ShippingMethod><![CDATA[USPSPriorityMail]]></ShippingMethod>

    <!-- ignored -->
    <PaymentMethod><![CDATA[Credit Card]]></PaymentMethod>
    <OrderTotal>123.45</OrderTotal>
    <TaxAmount>0.00</TaxAmount>
    <ShippingAmount>4.50</ShippingAmount>
    <!-- end:ignored -->

    <CustomerNotes><![CDATA[Please make sure it gets here by Dec. 22nd!]]></CustomerNotes>
    <InternalNotes><![CDATA[Ship by December 18th via Priority Mail.]]></InternalNotes>

    <!-- if any lines have gift message -->
    <Gift>false</Gift>
    <GiftMessage></GiftMessage>

    <!-- shipment number -->
    <CustomField1></CustomField1>

    <!-- unused -->
    <CustomField2></CustomField2>
    <CustomField3></CustomField3>

    <Customer>
      <CustomerCode><![CDATA[customer@mystore.com]]></CustomerCode>
      <BillTo>
        <Name><![CDATA[The President]]></Name>
        <Company><![CDATA[US Govt]]></Company>
        <Phone><![CDATA[512-555-5555]]></Phone>
        <Email><![CDATA[customer@mystore.com]]></Email>
      </BillTo>
      <ShipTo>
        <Name><![CDATA[The President]]></Name>
        <Company><![CDATA[US Govt]]></Company>
        <Address1><![CDATA[1600 Pennsylvania Ave]]></Address1>
        <Address2></Address2>
        <City><![CDATA[Washington]]></City>
        <State><![CDATA[DC]]></State>
        <PostalCode><![CDATA[20500]]></PostalCode>
        <Country><![CDATA[US]]></Country>
        <Phone><![CDATA[512-555-5555]]></Phone>
      </ShipTo>
    </Customer>
    <Items>
      <Item>
        <SKU><![CDATA[FD88821]]></SKU>
        <Name><![CDATA[My Product Name]]></Name>
        <ImageUrl><![CDATA[http://www.mystore.com/products/12345.jpg]]></ImageUrl>
        <Weight>8</Weight>
        <WeightUnits>Ounces</WeightUnits>
        <Quantity>2</Quantity>
        <UnitPrice>13.99</UnitPrice>
        <Location><![CDATA[A1-B2]]></Location>

        <!-- options are not used -->
        <Options>
          <Option>
            <Name><![CDATA[Size]]></Name>
            <Value><![CDATA[Large]]></Value>
            <Weight>10</Weight>
          </Option>
          <Option>
            <Name><![CDATA[Color]]></Name>
            <Value><![CDATA[Green]]></Value>
            <Weight>5</Weight>
          </Option>
        </Options>
      </Item>
    </Items>
  </Order>
</Orders>

Bundles

When a shipment has a bundle, the bundle items also appear as line items on the main shipment.