The id is required but did not completely solve the problem: ---------------------------------------- <!DOCTYPE webpage PUBLIC "-//Norman Walsh//DTD Website Full V2.6//EN" "file:///usr/local/docbook-website/schema/dtd/website-full.dtd" [ <!ENTITY % sharedEntities SYSTEM "file:///_srcBase_/foo/website/foo.ent"> %sharedEntities; ]> --------------------------------------- fails with error 128 while --------------------------------------- <!DOCTYPE webpage PUBLIC "-//Norman Walsh//DTD Website Full V2.6//EN" "file:///usr/local/docbook-website/schema/dtd/website-full.dtd"> ------------------------------------- transforms without error. Note _srcBase_ is defined in a global catalog as ------------------------------------------------------------------------------ <rewriteSystem systemIdStartString="file:///_srcBase_/" rewritePrefix="file:///home/foo/docbook/" /> ---------------------------------------------------------------------------------- and is resloved prior to ------------------------------------------------------------------------------ <nextCatalog catalog="catalog.xml" xml:base="file:///usr/local/docbook-website/" /> ---------------------------------------------------------------------------------- Works fine with both docbook.xsl and chunk.xsl Would appear the autolayout stylesheet may not like Entity declarations ... Raymond