Explicit tab and if-neccessary-pagebreaks?

Hello,

I'm rather new to DocBook and I've got two little problems, I tried a search but didn't find anything, so I hope someone could help me :)

1) There's an explicit line break, <sbr/>, which is very useful, but is there also some explicit tab available? Or better spoken, an explicit indentation tag? I couldn't find anything like that; if it doesn't exist, is there some good workaround?

2) Is there any possibility to declare a certain textarea that should NOT be victim of a pagebreak, if possible? With other words, can an area be defined so that if a pagebreak would occur inside this area, the stylesheet would insert a pagebreak BEFORE that area, so that it's more likely that the area is completely on one page and not broken?

Thanks in advance!
Rock Lobster