How to insert line breaks in a PDF generated with XSL-FO

Question

I am generating a PDF using XSL-FO and XML. In a textbox, the user can enter data like "1", then he presses ENTER, then "2", ENTER, "3", etc. But in the XML and hence in the PDF, the output is "1234567". How can I preserve the line breaks? I already tried white-space-collapse, linefeed-treatment and white-space-treatment but that didn't help.

My XSL looks like:

<xsl:template match="AddCmt">
    <fo:block keep-together="always"> Additional Comments 
        <fo:block-container border-style="solid" height="20mm" width="170mm" space-after="5mm"> 
            <fo:block> 
                <xsl:attribute name="id"> 
                    <xsl:value-of select="../CMT_ID"/> 
                </xsl:attribute> 
                <xsl:value-of select="../ANS_CMT"/> 
            </fo:block> 
        </fo:block-container> 
    </fo:block> 
</xsl:template> 

When I enter the following:

hello
medhavi
saraswat

This is the XML I get:

<?xml version="1.0" encoding="UTF-8" ?> 
<?xml-stylesheet type='text/xsl' href='e:\tmm-09.3\src\pmod\WorkOrder.xsl'?>
    <Root>
        <WorkOrders>
            <Detail>Id="ANS_436‌​_FLD_1" Label="qq">qq</Detail>
            <Ans Checked="0" Id="ANS_436_FLD_2" Label="ww">ww</Ans>
            <ID>ANS_436_FLD</ID>
            <ANS_FLD>0|0</ANS_FLD>
            <CMT_ID>ANS_436_CMT‌​</CMT_ID>
            <ANS_CMT>hello medhavi saraswat</ANS_CMT>
            <Warning>
                <Line>warning 11</Line>
                <Line>22</Line>
                <Line>33</Line>
                <Line>44</Line>
                <Line></Line>
                <Line>66</Lin‌​e>
                <Line>77</Line>
                <Line></Line>
            </Warning>

Answer 1

It should work with the following xml (you should add all the attributes):

<xsl:template match="AddCmt">
    <fo:block keep-together="always"> Additional Comments 
        <fo:block-container border-style="solid" height="20mm" width="170mm" space-after="5mm"> 
            <fo:block wrap-option="wrap" linefeed-treatment="preserve" white-space-collapse="false" white-space-treatment="preserve"> 
                <xsl:attribute name="id"> 
                    <xsl:value-of select="../CMT_ID"/> 
                </xsl:attribute> 
                <xsl:value-of select="../ANS_CMT"/> 
            </fo:block> 
        </fo:block-container> 
    </fo:block> 
</xsl:template> 

But as I mentioned in the comments, if your XML already has no linebreaks, there's no way your PDF will. You mentioned in your question there are no linebreaks in your XML, hence no linebreaks in the PDF.

Try checking out why there are no linebreaks in the XML. If you can provide any more information (a piece of your XML, the code you use to construct the XML, ...), please edit your answer and add the information.