human
Solve the following python programming problem given the following code:
def checkElements(val, modelDocument, parent) : 
    isSchema = (modelDocument.type == ModelDocument.Type.SCHEMA) 
    if isinstance (parent, ModelObject) : 
        parentXlinkType = parent.get ('{http://www.w3.org/1999/xlink}type') 
        isInstance = ((parent.namespaceURI == XbrlConst.xbrli) and (parent.localName == 'xbrl')) 
        parentIsLinkbase = ((parent.namespaceURI == XbrlConst.link) and (parent.localName == 'linkbase')) 
        parentIsSchema = ((parent.namespaceURI == XbrlConst.xsd) and (parent.localName == 'schema')) 
        if (isInstance or parentIsLinkbase) : 
            val.roleRefURIs = { 
                
} 
            val.arcroleRefURIs = { 
                
} 
            def linkbaseTopElts() : 
                for refPass in (True, False) : 
                    for child in parent.iterchildren () : 
                        if (refPass == (isinstance (child, ModelObject) and (child.localName in ('roleRef', 'arcroleRef')) and (child.namespaceURI == XbrlConst.link))) : 
                            (yield child) 
childrenIter = linkbaseTopElts () 
else : 
            childrenIter = parent.iterchildren () 
else : 
        parentXlinkType = None 
        isInstance = False 
        parentIsLinkbase = False 
        childrenIter = (parent.getroot (),) 
        if isSchema : 
            val.inSchemaTop = True 
parentIsAppinfo = False 
    if (modelDocument.type == ModelDocument.Type.INLINEXBRL) : 
        if isinstance (parent, ModelObject) : 
            if ((parent.localName == 'meta') and (parent.namespaceURI == XbrlConst.xhtml) and ((parent.get ('http-equiv') or '').lower () == 'content-type')) : 
                val.metaContentTypeEncoding = HtmlUtil.attrValue (parent.get ('content'), 'charset') 
else : 
            if isinstance (parent, etree._ElementTree) : 
                val.documentTypeEncoding = modelDocument.documentEncoding 
                val.metaContentTypeEncoding = '' 
instanceOrder = 0 
    if (modelDocument.type == ModelDocument.Type.SCHEMA) : 
       ...

    
    

    Fix the buggy line: val.modelXbrl.error ('SBR.NL.2.2.0.06', 'Schema element is not prefixed: "%(element)s"', modelObject = sl, element = elt.qname)
assistant
#Here is Python program to fix the buggy line: val.

val.modelXbrl.error ('SBR.NL.2.2.0.06', 'Schema element is not prefixed: "%(element)s"', modelObject = elt, element = elt.qname)