<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:variable name="allowed" select="'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_/'"/>

    <xsl:template match="emp">
        <xsl:for-each select="name">
            <xsl:call-template name="cut-bad-string">
                <xsl:with-param name="str" select="."/>
            </xsl:call-template>
        </xsl:for-each>
    </xsl:template>

    <xsl:template name="cut-bad-string">
        <xsl:param name="str"/>
        <xsl:param name="idx" select="1"/>

        <xsl:choose>
            <xsl:when test="string-length($str) &lt; $idx">
                <xsl:value-of select="$str"/>
                <br/>
            </xsl:when>
            <xsl:when test="string-length(normalize-space(translate(substring($str, $idx, 1), $allowed, ''))) = 0">
                <xsl:call-template name="cut-bad-string">
                    <xsl:with-param name="str" select="$str"/>
                    <xsl:with-param name="idx" select="$idx + 1"/>
                </xsl:call-template>
            </xsl:when>
            <xsl:otherwise>
                <xsl:value-of select="substring($str, 1, $idx - 1)"/>
                <br/>
            </xsl:otherwise> 
        </xsl:choose>
    </xsl:template>
</xsl:stylesheet>