BizTalk FlatFile Schema multiple irregular repeati

I try to map a schema using the following sample data. The dataset is described as follows:

currency
date
record ID
quantity
amount
narratives
blank line

The problem I had is

the line of narratives varies;
no tag cannot be used for currency.

USD
090115
990282.00499.03363
1
4.88
2 items in NOS

EUR
090115
990282.00499.03363
3
7.48
1 items in CVS
4 items in NOS

I was able to create a schema for your document by creating a "MainRecord", whose parent has a delimiter of two CRLFs. This then has the child elements of your individual lines, the last one of which is itself a record that is delimited by CRLF.

Note that I validated this in Visual Studio, but not in an actual BizTalk application - probably would require some additional tweaks to get fully operational, but this should get you going in the right direction of how to set up the schema in broad strokes.

<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns="http://BizTalk_Server_Project1.FlatFileSchema2" xmlns:b="http://schemas.microsoft.com/BizTalk/2003" targetNamespace="http://BizTalk_Server_Project1.FlatFileSchema2" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:appinfo>
      <schemaEditorExtension:schemaInfo namespaceAlias="b" extensionClass="Microsoft.BizTalk.FlatFileExtension.FlatFileExtension" standardName="Flat File" xmlns:schemaEditorExtension="http://schemas.microsoft.com/BizTalk/2003/SchemaEditorExtensions" />
      <b:schemaInfo standard="Flat File" codepage="65001" default_pad_char=" " pad_char_type="char" count_positions_by_byte="false" parser_optimization="speed" lookahead_depth="3" suppress_empty_nodes="false" generate_empty_nodes="true" allow_early_termination="false" early_terminate_optional_fields="false" allow_message_breakup_of_infix_root="false" compile_parse_tables="false" root_reference="Root" />
    </xs:appinfo>
  </xs:annotation>
  <xs:element name="Root">
    <xs:annotation>
      <xs:appinfo>
        <b:recordInfo structure="delimited" child_delimiter_type="hex" child_delimiter="0xD 0xA 0xD 0xA" child_order="infix" sequence_number="1" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" />
      </xs:appinfo>
    </xs:annotation>
    <xs:complexType>
      <xs:sequence>
        <xs:annotation>
          <xs:appinfo>
            <groupInfo sequence_number="0" xmlns="http://schemas.microsoft.com/BizTalk/2003" />
          </xs:appinfo>
        </xs:annotation>
        <xs:element maxOccurs="unbounded" name="MainRecord">
          <xs:annotation>
            <xs:appinfo>
              <b:recordInfo structure="delimited" child_delimiter_type="hex" child_delimiter="0xD 0xA" child_order="infix" sequence_number="1" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" />
            </xs:appinfo>
          </xs:annotation>
          <xs:complexType>
            <xs:sequence>
              <xs:annotation>
                <xs:appinfo>
                  <groupInfo sequence_number="0" xmlns="http://schemas.microsoft.com/BizTalk/2003" />
                </xs:appinfo>
              </xs:annotation>
              <xs:element name="Currency" type="xs:string">
                <xs:annotation>
                  <xs:appinfo>
                    <b:fieldInfo justification="left" sequence_number="1" />
                  </xs:appinfo>
                </xs:annotation>
              </xs:element>
              <xs:element name="Date" type="xs:string">
                <xs:annotation>
                  <xs:appinfo>
                    <b:fieldInfo justification="left" sequence_number="2" />
                  </xs:appinfo>
                </xs:annotation>
              </xs:element>
              <xs:element name="RecordId" type="xs:string">
                <xs:annotation>
                  <xs:appinfo>
                    <b:fieldInfo justification="left" sequence_number="3" />
                  </xs:appinfo>
                </xs:annotation>
              </xs:element>
              <xs:element name="Quantity" type="xs:string">
                <xs:annotation>
                  <xs:appinfo>
                    <b:fieldInfo justification="left" sequence_number="4" />
                  </xs:appinfo>
                </xs:annotation>
              </xs:element>
              <xs:element name="Amount" type="xs:string">
                <xs:annotation>
                  <xs:appinfo>
                    <b:fieldInfo justification="left" sequence_number="5" />
                  </xs:appinfo>
                </xs:annotation>
              </xs:element>
              <xs:element maxOccurs="unbounded" name="Narratives">
                <xs:annotation>
                  <xs:appinfo>
                    <b:recordInfo structure="delimited" child_delimiter_type="hex" child_delimiter="0xD 0xA" child_order="infix" sequence_number="6" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" />
                  </xs:appinfo>
                </xs:annotation>
                <xs:complexType>
                  <xs:sequence>
                    <xs:annotation>
                      <xs:appinfo>
                        <groupInfo sequence_number="0" xmlns="http://schemas.microsoft.com/BizTalk/2003" />
                      </xs:appinfo>
                    </xs:annotation>
                    <xs:element name="Narrative" type="xs:string">
                      <xs:annotation>
                        <xs:appinfo>
                          <b:fieldInfo justification="left" sequence_number="1" />
                        </xs:appinfo>
                      </xs:annotation>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>