Could somebody say what this catalog-dita.xml file is and how could I transform to xml and back?

Question

I'm updating old DITA-OT and there is file used catalog-dita.txt which contents seems same as catalog-dita.xml - only thing that in newer DITA-OT there is no txt files

catalog-dita.txt:

--              (C) Copyright OASIS Open 2005, 2009.               --
--              (C) Copyright IBM Corporation 2001, 2004.          --
--              All Rights Reserved.                               --
--                                                                 --
--   UPDATES:                                                      --
--     2005.11.15 RDA: Corrected system ID for topicAttr.mod       --
--     2005.11.15 RDA: Corrected public ID for tblDecl.mod         --
--     2005.11.15 RDA: Removed @xml:base from <group>              --
--     2006.06.07 RDA: Added commonElements.mod                    --
--     2006.06.07 RDA: Added indexing domain                       --
--     2006.06.20 RDA: Added bookmap and XNAL domain               --
--     2006.11.30 RDA: Added version specific public IDs           --
--     2008.01.25 RDA: Added DITA 1.2 version specific IDs         --
--     2008.02.01 RDA: *.ent files for topic types                 --
--     2008.02.12 RDA: Add hazard statement domain                 --
--     2008.02.13 RDA: Added DITA 1.x PUBLIC IDs                   --
--     2008.04.11 RDA: Added Learning specializations              --
--     2008.04.15 RDA: Added Machine Industry specializations      --
--     2008.04.15 RDA: Reorganized DTDs into subdirectories        --
--     2008.06.03 RDA: Added glossary group, glossary domains      --
--     2008.11.24 RDA: Added ditaval                               --
--     2009.01.05 RDA: Rename machineIndustry dir to machinery     --
--     2009.11.10 RDA: Add entries for glossentry.*                --
--     2009.12.03 RDA: Add entry for learningInteractionBaseDomain --
--     2010.04.08 RDA: Add basemap.dtd and basetopic.dtd           --
--  Catalog for Dita DTDs  --
BASE "base/dtd/" 
PUBLIC "-//OASIS//ELEMENTS DITA Topic//EN" "topic.mod"
PUBLIC "-//OASIS//ELEMENTS DITA 1.x Topic//EN" "topic.mod"
PUBLIC "-//OASIS//ELEMENTS DITA 1.2 Topic//EN" "topic.mod"

PUBLIC "-//OASIS//ENTITIES DITA Topic Definitions//EN" "topicDefn.ent"
PUBLIC "-//OASIS//ENTITIES DITA 1.x Topic Definitions//EN" "topicDefn.ent"
PUBLIC "-//OASIS//ENTITIES DITA 1.2 Topic Definitions//EN" "topicDefn.ent"

PUBLIC "-//OASIS//ENTITIES DITA Topic Class//EN" "topicAttr.mod"
PUBLIC "-//OASIS//ELEMENTS DITA Map//EN" "map.mod"
PUBLIC "-//OASIS//ELEMENTS DITA 1.x Map//EN" "map.mod"
PUBLIC "-//OASIS//ELEMENTS DITA 1.2 Map//EN" "map.mod"

catalog-dita.xml:

<?xml version="1.0" ?>
<!--             (C) Copyright OASIS Open 2005, 2009.              -->
<!--             (C) Copyright IBM Corporation 2001, 2004.         -->
<!--             All Rights Reserved.                              -->
<!--                                                               -->
<!--  UPDATES:                                                     -->
<!--    2005.11.15 RDA: Corrected system ID for topicAttr.mod      -->
<!--    2005.11.15 RDA: Corrected public ID for tblDecl.mod        -->
<!--    2005.11.15 RDA: Removed @xml:base from <group>             -->
<!--    2006.06.07 RDA: Added commonElements.mod                   -->
<!--    2006.06.07 RDA: Added indexing domain                      -->
<!--    2006.06.20 RDA: Added bookmap and XNAL domain              -->
<!--    2006.11.30 RDA: Added version specific public IDs          -->
<!--    2008.01.25 RDA: Added DITA 1.2 version specific IDs        -->
<!--    2008.02.01 RDA: *.ent files for topic types                -->
<!--    2008.02.12 RDA: Add hazard statement domain                -->
<!--    2008.02.13 RDA: Added DITA 1.x PUBLIC IDs                  -->
<!--    2008.04.11 RDA: Added Learning specializations             -->
<!--    2008.04.15 RDA: Added Machine Industry specializations     -->
<!--    2008.04.15 RDA: Reorganized DTDs into subdirectories       -->
<!--    2008.06.03 RDA: Added glossary group, glossary domains     -->
<!--    2008.11.24 RDA: Added ditaval                              -->
<!--    2009.01.05 RDA: Rename machineIndustry dir to machinery    -->
<!--    2009.11.10 RDA: Add entries for glossentry.*               -->
<!--    2009.12.03 RDA: Add entry for learningInteractionBaseDomain -->
<!--    2010.04.08 RDA: Add basemap.dtd and basetopic.dtd          -->

<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"
         prefer="public">

<!-- Catalog for Dita DTDs -->

  <group xml:base="base/dtd/">
    <!-- Topics -->
    <public publicId="-//OASIS//ELEMENTS DITA Topic//EN"
            uri="topic.mod"/>
    <public publicId="-//OASIS//ELEMENTS DITA 1.x Topic//EN"
            uri="topic.mod"/>
    <public publicId="-//OASIS//ELEMENTS DITA 1.2 Topic//EN"
            uri="topic.mod"/>
    <public publicId="-//OASIS//ENTITIES DITA Topic Definitions//EN"
            uri="topicDefn.ent"/>
    <public publicId="-//OASIS//ENTITIES DITA 1.x Topic Definitions//EN"
            uri="topicDefn.ent"/>
    <public publicId="-//OASIS//ENTITIES DITA 1.2 Topic Definitions//EN"
            uri="topicDefn.ent"/>
    <!-- topicAttr.mod is only used in DITA 1.0; kept for backwards compatibility -->
    <public publicId="-//OASIS//ENTITIES DITA Topic Class//EN"
            uri="topicAttr.mod"/>

Could somebody say what this txt file is? What format it is? Easiest would be to transform the new xml to txt if there would be such tools.

Answer 1

I believe it's just a text representation of the XML catalog. It has not been included since (I believe) 2.0 (current version is 3.3.4).