I have this simplexml object and it looks fine, but when i convert a part of it... like: $xmlMeshHeading = $MeshHeading->asXML();

I suddenly get attributes which i can't find in the simple XML object...? Here are some parts of the two files:

SimpleXMLObject:

[MeshHeadingList] => SimpleXMLElement Object [DescriptorName] => Acoustic Stimulation 
                                (
                                    [MeshHeading] => Array
                                        (
                                            [0] => SimpleXMLElement Object
                                                (

                                                    [QualifierName] => methods
                                                )

                                            [1] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Adolescent
                                                )

                                            [2] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Age Factors
                                                )

                                            [3] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Child
                                                )

                                            [4] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Electromyography
                                                    [QualifierName] => methods
                                                )

                                            [5] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Female
                                                )

                                            [6] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Galvanic Skin Response
                                                    [QualifierName] => physiology
                                                )

                                            [7] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Humans
                                                )

                                            [8] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Male
                                                )

                                            [9] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Muscle, Skeletal
                                                    [QualifierName] => physiology
                                                )

                                            [10] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Probability
                                                )

                                            [11] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Reaction Time
                                                    [QualifierName] => physiology
                                                )

                                            [12] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Sex Factors
                                                )

                                            [13] => SimpleXMLElement Object
                                                (
                                                    [DescriptorName] => Startle Reaction
                                                    [QualifierName] => physiology
                                                )

Ve burada asXML dosyası ... aynı kaynaktan geliyor:

 <MeshHeadingList>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Acoustic Stimulation</DescriptorName>
                <QualifierName MajorTopicYN="N">methods</QualifierName>
            </MeshHeading>

            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Adolescent</DescriptorName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Age Factors</DescriptorName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Child</DescriptorName>

            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Electromyography</DescriptorName>
                <QualifierName MajorTopicYN="Y">methods</QualifierName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Female</DescriptorName>

            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Galvanic Skin Response</DescriptorName>
                <QualifierName MajorTopicYN="N">physiology</QualifierName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Humans</DescriptorName>

            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Male</DescriptorName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Muscle, Skeletal</DescriptorName>
                <QualifierName MajorTopicYN="Y">physiology</QualifierName>

            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Probability</DescriptorName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Reaction Time</DescriptorName>
                <QualifierName MajorTopicYN="N">physiology</QualifierName>

            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Sex Factors</DescriptorName>
            </MeshHeading>
            <MeshHeading>
                <DescriptorName MajorTopicYN="N">Startle Reaction</DescriptorName>
                <QualifierName MajorTopicYN="Y">physiology</QualifierName>

            </MeshHeading>
        </MeshHeadingList>

My question is... 1. Is there a function to "unhide" the attributes in SimpleXML? OR 2. How can i get stuff from an XML file, like attributes and the values...?

Best, Thijs