Communication of structured document content between 3270 logical units

A method for passing structured document content from a second application in a Secondary Logical Unit (SLU) to a first application in a Primary Logical Unit (PLU) that communicate with each other over a network using 3270 data stream architecture, the method comprising the steps of:

• sending structured document content from the second application to the corresponding SLU;
• waiting until a 3270 communications session between the PLU and the SLU is in brackets and the SLU has permission to send;
• sending a Begin Brackets, Change Direction request header from the SLU to the PLU;
• sending a chain from the SLU to the PLU, the chain containing a 3270 data stream structured field with at least some of the structured document content embedded therein;
• if the chain does not contain all of the structured document content embedded therein, sending a Change Direction request header from the PLU to the SLU;
• if the chain does not contain all of the structured document content embedded therein, repeating the step of sending a Change Direction request header and the step of sending a chain from the SLU to the PLU, until all the embedded structured document content has been sent from the SLU to the PLU;
• and
• sending the embedded structured document content from the PLU to the first application after all the embedded structured document content have been sent from the SLU to the PLU.

A method for passing structured document content from a document producer in a Primary Logical Unit (PLU) to a document consumer in a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the method comprising the steps of:

• sending structured document content from the document producer to the PLU;
• sending a Begin Brackets/End Brackets request header from the PLU to the SLU over the network using a 3270 communications session;
• sending a single request unit from the PLU to the SLU using the 3270 communications session, the single request unit containing a 3270 data stream structured field with the structured document content embedded therein;
• sending the embedded structured document content from the SLU to the document consumer;
• and
• processing the structured document content by the document consumer.

A method for communicating between a Primary Logical Unit (PLU) and a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the method comprising the steps of:

• sending 3270 data stream communications between a first legacy application co-located with the PLU and a second legacy application co-located with the SLU over the network using 3270 data stream architecture;
• sending 3270 data stream structured fields including embedded structured document content between a first structured document application co-located with the PLU and a second structured document application co-located with the SLU over the network using 3270 data stream architecture;
• and
• repeatedly performing the step of sending 3270 data stream communications and the step of sending 3270 data stream structured fields, in an arbitrary sequence, to thereby send 3270 data streams and structured document content between the first and second legacy applications and the first and second structured document applications over the network using 3270 data stream architecture.

A system for passing structured document content from a first application in a Primary Logical Unit (PLU) to a second application in a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the system comprising:

• means for sending structured document content from the first application to the corresponding PLU;
• means for waiting until a 3270 communications session between the PLU and the SLU is between brackets, or is in brackets and the PLU has permission to send;
• if the session is between brackets, means for sending a Begin Brackets request header from the PLU to the SLU;
• means for sending at least one request unit from the PLU to the SLU, the at least one request unit containing a 3270 data stream structured field with the structured document content embedded therein;
• and
• means for sending the embedded structured document content from the SLU to the second application.

A system for passing structured document content from a second application in a Secondary Logical Unit (SLU) to a first application in a Primary Logical Unit (PLU) that communicate with each other over a network using 3270 data stream architecture, the system comprising:

• means for sending structured document content from the second application to the corresponding SLU;
• means for waiting until a 3270 communications session between the PLU and the SLU is in brackets and the SLU has permission to send;
• means for sending a Begin Brackets, Change Direction request header from the SLU to the PLU;
• means for sending a chain from the SLU to the PLU, the chain containing a 3270 data stream structured field with at least some of the structured document content embedded therein;
• if the chain does not contain all of the structured document content embedded therein, means for sending a Change Direction request header from the PLU to the SLU;
• if the chain does not contain all of the structured document content embedded therein, means for repeating the means for sending a Change Direction request header and the means for sending a chain from the SLU to the PLU, until all the embedded structured document content has been sent from the SLU to the PLU;
• and
• means for sending the embedded structured document content from the PLU to the first application after all the embedded structured document content have been sent from the SLU to the PLU.

A system for passing structured document content from a document producer in a Primary Logical Unit (PLU) to a document consumer in a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the system comprising:

• means for sending structured document content from the document producer to the PLU;
• means for sending a Begin Brackets/End Brackets request header from the PLU to the SLU over the network using a 3270 communications session;
• means for sending a single request unit from the PLU to the SLU using the 3270 communications session, the single request unit containing a 3270 data stream structured field with the structured document content embedded therein;
• means for sending the embedded structured document content from the SLU to the document consumer;
• and
• means for processing the structured document content by the document consumer.

A system for communicating between a Primary Logical Unit (PLU) and a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the system comprising:

• means for sending 3270 data stream communications between a first legacy application co-located with the PLU and a second legacy application co-located with the SLU over the network using 3270 data stream architecture;
• means for sending 3270 data stream structured fields including embedded structured document content between a first structured document application co-located with the PLU and a second structured document application co-located with the SLU over the network using 3270 data stream architecture;
• and
• means for repeatedly performing the means for sending 3270 data stream communications and the means for sending 3270 data stream structured fields, in an arbitrary sequence, to thereby send 3270 data streams and structured document content between the first and second legacy applications and the first and second structured document applications over the network using 3270 data stream architecture.

A computer program product for passing structured document content from a first application in a Primary Logical Unit (PLU) to a second application in a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the computer program product embodied on a computer-readable medium and comprising:

• computer-readable program code means for sending structured document content from the first application to the corresponding PLU;
• computer-readable program code means for waiting until a 3270 communications session between the PLU and the SLU is between brackets, or is in brackets and the PLU has permission to send;
• if the session is between brackets, computer-readable program code means for sending a Begin Brackets request header from the PLU to the SLU;
• computer-readable program code means for sending at least one request unit from the PLU to the SLU, the at least one request unit containing a 3270 data stream structured field with the structured document content embedded therein;
• and
• computer-readable program code means for sending the embedded structured document content from the SLU to the second application.

A computer program product for passing structured document content from a second application in a Secondary Logical Unit (SLU) to a first application in a Primary Logical Unit (PLU) that communicate with each other over a network using 3270 data stream architecture, the computer program product embodied on a computer-readable medium and comprising:

• computer-readable program code means for sending structured document content from the second application to the corresponding SLU;
• computer-readable program code means for waiting until a 3270 communications session between the PLU and the SLU is in brackets and the SLU has permission to send;
• computer-readable program code means for sending a Begin Brackets, Change Direction request header from the SLU to the PLU;
• computer-readable program code means for sending a chain from the SLU to the PLU, the chain containing a 3270 data stream structured field with at least some of the structured document content embedded therein;
• if the chain does not contain all of the structured document content embedded therein, computer-readable program code means for sending a Change Direction request header from the PLU to the SLU;
• if the chain does not contain all of the structured document content embedded therein, computer-readable program code means for repeating the computer-readable program code means for sending a Change Direction request header and the computer-readable program code means for sending a chain from the SLU to the PLU, until all the embedded structured document content has been sent from the SLU to the PLU;
• and
• computer-readable program code means for sending the embedded structured document content from the PLU to the first application after all the embedded structured document content have been sent from the SLU to the PLU.

A computer program product for passing structured document content from a document producer in a Primary Logical Unit (PLU) to a document consumer in a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the computer program product embodied on a computer-readable medium and comprising:

• computer-readable program code means for sending structured document content from the document producer to the PLU;
• computer-readable program code means for sending a Begin Brackets/End Brackets request header from the PLU to the SLU over the network using a 3270 communications session;
• computer-readable program code means for sending a single request unit from the PLU to the SLU using the 3270 communications session, the single request unit containing a 3270 data stream structured field with the structured document content embedded therein;
• computer-readable program code means for sending the embedded structured document content from the SLU to the document consumer;
• and
• computer-readable program code means for processing the structured document content by the document consumer.

A computer program product for communicating between a Primary Logical Unit (PLU) and a Secondary Logical Unit (SLU) that communicate with each other over a network using 3270 data stream architecture, the computer program product embodied on a computer-readable medium and comprising:

• computer-readable program code means for sending 3270 data stream communications between a first legacy application co-located with the PLU and a second legacy application co-located with the SLU over the network using 3270 data stream architecture;
• computer-readable program code means for sending 3270 data stream structured fields including embedded structured document content between a first structured document application co-located with the PLU and a second structured document application co-located with the SLU over the network using 3270 data stream architecture;
• and
• computer-readable program code means for repeatedly performing the computer-readable program code means for sending 3270 data stream communications and the computer-readable program code means for sending 3270 data stream structured fields, in an arbitrary sequence, to thereby send 3270 data streams and structured document content between the first and second legacy applications and the first and second structured document applications over the network using 3270 data stream architecture.