How to replace a xml tag with DTD entity

[moji20cpp]

I can replace a xml Attribute values using DTD Entity declaration using following methode\[code\]//in DTD<!ENTITY varchar "VARCHAR(200)">// In xml <column name="attachment_url" type="&varchar;"/>\[/code\]Now I want to replace a xml tag like \[code\]<column name="attachment_url" type="VARCHAR(200)"/>\[/code\] using DTD Entity.I try like \[code\]<!ENTITY full_coulumn "<column name="attachment_url" type="VARCHAR(200)"/>">\[/code\] then i get an error \[code\] Unexpected column with text: <column name="attachment_url" type="VARCHAR(200)"/>\[/code\]Is it possible to replace entire xml tag with dtd Entity? How can i do that? I am try to do this with liquibase xml file.